ISSN 1561081-0
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WORKING PAPER SER IESNO 633 / MAY 2006
NOWCASTING GDP AND INFLATION
THE REAL-TIME INFORMATIONAL CONTENT OF MACROECONOMIC DATA RELEASES
Lucrezia Reichlinand David H. Small
by Domenico Giannone,
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WORK ING PAPER SER IE SNO 633 / MAY 2006
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1 We would like to thank the Division of Monetary Affairs of the Board of Governors of the Federal Reserve System for
contract of the Belgian Federal Government and an ARC grant of the Communaute Francaise de Belgique. We thank our research
Thanks are also due to David Wilcox and William Wascher for their comments, to seminar participants at the Fed in April 2004 and to our discussant Athanasios Orphanides at the EABCN conference in Brussels in June 2005. The opinions in this paper are
those of the authors and do not necessarily reflect the views of the European Central Bank or the Federal Reserve System.2 ECARES, Université Libre de Bruxelles - CP 114 - av. Jeanne, 44, B-1050, Brussels, Belgium; e-mail: [email protected]
3 CEPR and European Central Bank, Kaiserstrasse 29, 60311 Frankfurt am Main, Germany; e-mail: [email protected] Federal Reserve Board, 20th and Constitution Avenue NW, Washington, D.C. 20551, United States; email: [email protected]
NOWCASTING GDP AND INFLATION
THE REAL-TIME INFORMATIONAL
CONTENT OF MACROECONOMIC DATA RELEASES 1
by Domenico Giannone 2,Lucrezia Reichlin 3
and David H. Small 4
encouragement to pursue this project and providing financial support to Lucrezia Reichlin. Giannone were supported by a PAI
assistants at the Fed, Ryan Michaels and Claire Hausman, and Michele Modugno at ECARES, Université Libre de Bruxelles.
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ISSN 1561-0810 (print)ISSN 1725-2806 (online)
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Working Paper Series No 633May 2006
Abstract 4
Non-technical summary 5
6
2 The problem and the structure of the data sets 8
2.1 The problem 8
3 The econometric methodology 11
3.1 The model 11
3.2 Forecasts and uncertainty 13
4 Empirics 15
4.1 Data 15
4.2 News and uncertainty in real-time 17
4.3 The information content of the blocksconditional on timeliness 25
5 Summary and conclusion 27
References 28A Appendix 30
B Data releases and sources 36
C Blocks and individual series 37
D Tables 42
European Central Bank Working Paper Series 46
1 Introduction
CONTENTS
Abstract
This paper formalizes the process of updating the nowcast and forecast on out-put and inflation as new releases of data become available. The marginal contribu-tion of a particular release for the value of the signal and its precision is evaluatedby computing “news” on the basis of an evolving conditioning information set. Themarginal contribution is then split into what is due to timeliness of informationand what is due to economic content. We find that the Federal Reserve Bank ofPhiladelphia surveys have a large marginal impact on the nowcast of both inflationvariables and real variables and this effect is larger than that of the EmploymentReport. When we control for timeliness of the releases, the effect of hard databecomes sizeable. Prices and quantities affect the precision of the estimates ofinflation while GDP is only affected by real variables and interest rates.
JEL Classification: E52, C33, C53
Keywords: Forecasting, Monetary Policy, Factor Model, Real Time Data, LargeData Sets, News
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Non-technical summary Monetary policy decisions in real time are based on assessments of current and future economic conditions using incomplete data. Since most data are released with a lag and are subsequently revised, the reconstruction of current-quarter GDP, inflation and other key variables is an important task for central banks and one to which they devote a considerable amount of resources. Current-quarter numbers are also important because, in the short-run, there is a greater degree of forecastability than in the long run. For example, Giannone, Reichlin and Sala, 2005 document that, in forecasting GDP beyond the first quarter, the forecasts of the Federal Reserve staff and of standard statistical models do not perform better than that of a constant growth rate. Current-quarter estimates are particularly relevant because they are inputs for model-based longer term forecasting exercises. Nowcasts are constructed at central banks using both simple models and qualitative judgment. Those exercises involve the analysis of a large amount of information and a judgment on the relative weight to attribute to various data series. As new information becomes available throughout the month, the nowcasts and forecasts may be adjusted in response to changes in both the values of the data series and the implicit relative weights applied to those series. Typically, central banks and markets pay particular attention to certain data releases either because they arrive earlier, and can therefore convey news on key variables such as GDP, or because they are inputs in their estimates (e.g. industrial production or the Employment Report for GDP). In principle, however, any release, no matter at what frequency, may potentially affect current-quarter estimates and their precision. From the point of view of the short-term forecaster, there is no reason to throw away any information. This paper provides a framework that formalizes the updating of the nowcast and forecast of output and inflation as data are released throughout the month and that can be used to evaluate the marginal impact of new data releases on the precision of the now/forecast as well as the marginal contribution of different groups of variables. In the empirics, we focus on the nowcast and we use intra-month releases of monthly time series to construct (possibly) progressively more accurate current-quarter estimates. Our approach allows us to consider a large number of monthly time series (in principle all the potentially relevant ones) within the same forecasting model. Moreover, the model takes into account the non-synchronicity of the releases by exploiting vintages of panel data which are unbalanced at the end of the sample. The marginal contribution of a particular release for the value of the signal and its precision is evaluated by computing ``news'' on the basis of an evolving conditioning information set. The marginal contribution is then split into what is due to timeliness of information and what is due to economic content. We find that the Federal Reserve Bank of Philadelphia surveys have a large marginal impact on the nowcast of both inflation variables and real variables and this effect is larger than that of the Employment Report. When we control for timeliness of the releases, the effect of hard data becomes sizeable. Prices and quantities affect the precision of the estimates of inflation while GDP is only affected by real variables and interest rates.
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1 Introduction
Monetary policy decisions in real time are based on assessments of current and futureeconomic conditions using incomplete data. Since most data are released with a lag andare subsequently revised, the reconstruction of current-quarter GDP, inflation and otherkey variables is an important task for central banks and one to which they devote aconsiderable amount of resources. Current-quarter numbers are also important because,in the short-run, there is a greater degree of forecastability than in the long run. Forexample, Giannone, Reichlin, and Sala (2004) (GRS from now on) document that, inforecasting GDP beyond the first quarter, the forecasts of the Federal Reserve staff andof standard statistical models do not perform better than that of a constant growthrate. Current-quarter estimates are particularly relevant because they are inputs formodel-based longer term forecasting exercises.
Nowcasts are constructed at central banks using both simple models and qualitativejudgment. Those exercises involve the analysis of a large amount of information and ajudgment on the relative weight to attribute to various data series. As new informationbecomes available throughout the month, the nowcasts and forecasts may be adjusted inresponse to changes in both the values of the data series and the implicit relative weightsapplied to those series. Typically, central banks and markets pay particular attentionto certain data releases either because they arrive earlier, and can therefore conveynews on key variables such as GDP, or because they are inputs in their estimates (e.g.industrial production or the Employment Report for GDP). In principle, however, anyrelease, no matter at what frequency, may potentially affect current-quarter estimatesand their precision. From the point of view of the short-term forecaster, there is noreason to throw away any information.
This paper provides a framework that formalizes the updating of the nowcast andforecast of output and inflation as data are released throughout the month and thatcan be used to evaluate the marginal impact of new data releases on the precision of thenow/forecast as well as the marginal contribution of different groups of variables. Inthe empirics, we focus on the nowcast and we use intra-month releases of monthly timeseries to construct (possibly) progressively more accurate current-quarter estimates.Our approach allows us to consider a large number of monthly time series (in principleall the potentially relevant ones) within the same forecasting model. Moreover, themodel takes into account the non-synchronicity of the releases by exploiting vintagesof panel data which are unbalanced at the end of the sample.
The framework we propose is adapted from the parametric dynamic factor modelproposed by Doz, Giannone, and Reichlin (2005) and applied by GRS to the samevariables we are using here. It is similar in spirit to Evans (2005), but our focusis different since we exploit a large number of data series rather than just financialvariables and we don’t consider information at frequencies lower than the month.
Using this framework, we ask three specific empirical questions. The first is whethera large information set really helps to obtain an early and accurate estimate of currentinflation and output. Several papers have made the point that a large informationset helps in forecasting (cfr. Boivin and Ng (2005), Forni, Hallin, Lippi, and Reichlin(2003), Giannone, Reichlin, and Sala (2004), Marcellino, Stock, and Watson (2003),
6ECBWorking Paper Series No 633May 2006
Stock and Watson (2002)). This literature proposes and applies factor models adaptedto handle large panels of time series. On the basis of such models, Bernanke and Boivin(2003) and GRS formalize the real-time application of large datasets to nowcasting andforecasting inflation and output in the United States. GRS in particular show thata specification of the model with two dynamic factors has a forecasting performancecomparable to that of the Federal Reserve’s Greenbook.
This paper builds on this literature, but instead of performing an out-of sampleforecasting exercise, we compute measures of news and uncertainty and study theirevolution as new information becomes available within the month. This is achieved byderiving explicitly the standard error of the nowcast or forecast as a function of the sizeof the information set. Changes in this standard error allow us to track the evolutionof the uncertainty of the forecast and nowcast as the flow of information evolves withina month.
The second question is the assessment of the marginal contribution of particular setsof variables in constructing the nowcasts. What kind of information really matters? Toprovide an answer, we update our nowcasts and forecasts following each data releasewithin the month and construct empirical measures of the “news” in each data blockby conditioning on the data that was available in real time when the data was releasedand that is evolving within the month. Because the data are released in blocks and thereleases follow a relatively stable calendar, each month the updates and news for eachtype of data release are conditional on the same (updated) set of data releases. Sinceblocks of releases typically correspond to an economic classification: money indicators,prices, industrial production series, labor market variables etc., our measure of newsrefers to aggregates of variables in a certain category rather than to a single indicator.
The third question is whether the marginal contribution of a block of releases is dueto its “timeliness” or to its “quality.” The distinction between timeliness and qualityarises because the marginal value of a data release depends on the new information inthe release; i.e. it depends on the difference between the data that are released andthe values that were predicted by the model just before the release. The earlier a givenseries is released (timeliness), the smaller the information set for its predicted value andthe greater, ceteris paribus, is the news in the release. Its “quality” depends on thepredictive power of an information block given the same conditioning information setas for other information blocks. Since data are very collinear, the order of the releasematters and we may have a situation where high quality data such as GDP, have nomarginal impact on GDP itself since they are released with a long lag.
The paper is organized as follows. In Section 2, we describe the problem and thestructure of the staggered releases in the United States. In Section 3 we introducethe model, our estimation technique, the computation of the standard errors, andthe method for examining the “timeliness” of data. Section 4 describes the empiricalanalysis and comments on the results. Section 5 concludes.
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2 The Problem and the Structure of the Data Sets
2.1 The Problem
We will first describe the problem we are analyzing in a very stylized way. Our aim isto evaluate the current quarter nowcast of key indicators of real economic activity andprice dynamics on the basis of the flow of information that becomes available duringthe quarter.
Within each quarter, contemporaneous values of key macroeconomic variables likeGDP are not available, but they can be estimated using higher frequencies variableswhich are recorded and published more timely. At month v we can define the relevantinformation set Ωn
v which includes the relevant n monthly time series and the relevantsample up to month v and compute the following projection:
Proj[GDPt | Ωnv ].
Let us assume that Ωnv is composed of two blocks [Ωn1
v Ωn2v ] and that the variables
in Ωn2v , say production, are released a month later than those in Ωn1
v , say surveys.This implies that, in month v, variables in Ωn1
v are available up to month v, whilevariables in Ωn2
v are available up to month v − 1. In order not to lose the informationin Ωn2
v available up to the previous month, we will have to project on the basis of adataset which is unbalanced at the end of the month. Our forecasting problem is thegeneralization of this simple case.
The conditioning set in the projection is a large panel of monthly time series, con-sisting of about 200 series for the US economy, broadly those examined closely by thestaff of the Federal Reserve when making the forecasts.
The data considered are published in thirty six releases per month. The blockscontain direct measures both of real economic activity and prices, and of aggregate andsectoral variables. Moreover, they include indirect measures of economic developments,such as surveys, financial prices that may reflect current and expected future economicdevelopments and measures of money and credit.
To set the notation, we will denote the information set by:
Ωvj =Yit|vj
; i = 1, ..., n; t = 1, ..., Tivj
where v denotes the month of the release, and vj the date of the jth data release withinthe month. At each point in time vj , we will refer to the information set as vintage. Thelatter is composed n variables, Yit|vj
, where i = 1, ..., n identifies the individual timeseries and t = 1, ..., Tivj denotes time in months. Here, Tivj indicates the last periodfor which series i in vintage vj has an observed value. For example, when industrialproduction is released in month v, the last available observation refers to the previousmonth Tivj = v− 1, while when surveys are released, the last values refer to the monthof the releases Tivj = v.
Let us now track the flow of information within the quarter of interest. We willfollow the convention that a quarter k is dated by its last month (for example, the firstquarter of 2005, is dated by k =March05). Release j within each quarter k is given
8ECBWorking Paper Series No 633May 2006
by Ωvj where v = k − 2, k − 1, k, are, respectively, the first, the second and the thirdmonth of quarter k.
At vj , a set of variables Yi,t, i ∈ Ivj is released and the information set expandsfrom Ωvj−1 to Ωvj . The new information set differs from the preceding one for tworeasons. First, there are new, more recent, observations: Tivj ≥ Tivj−1 , i ∈ Ivj , whileTivj = Tivj−1 , i /∈ Ivj . Second, old data are revised, and data revisions are given byYit|vj
− Yit|vj−1, i ∈ Ivj . Notice that in absence of data revisions Ωvj−1 ⊆ Ωvj , i.e. the
information set is expanding as time passes by.The timing and the order of data releases can vary from month to month, i.e. Ivj can
be different from Ivj , for v 6= v. However, releases typically correspond to an economicclassification: money indicators, prices, industrial productions, labor market variablesetc. and with few exceptions, the differences in the chronological order of the releases arelimited. This allows us to construct a stylized calendar in which we combine the seriesinto fifteen data blocks so that, in most cases, they consist of roughly homogeneousvariables, containing data released at roughly the same time in the month, roughlypreserving the chronological order in which the data are released. We call pseudovintages the releases which refer to our stylized calendar. We have: Ivj = Ij , j =0, 1, · · · , J .
We want to stress here that, abstracting from data revisions, due to the non syn-chronicity of data releases, the intra month flow of data is mainly reflected in theincrease of cross-sectional information. In particular, at each release date vj the in-formation set expands because of the inclusion of new information about a group ofvariables that corresponds to a particular economic classification.
For each information set within the quarter of interest, we compute the nowcastfor the variables of interest by simple projection. For a generic variable zq
k, e.g. GDPgrowth rate, where the superscript q indicates that the variables is measured at quar-terly frequency, we have:
zqk|vj
= Proj[zqk|Ωvj
], v = k, k − 1, k − 2, j = 1, ..., J.
Once we have obtained the projections, we can compute the news in block j as thechange that the release of block j induces in the current estimates of the variable ofinterest:
NEWS[zqk, vj ] = zq
k|vj− zq
k|vj−1. (2.1)
Notice that NEWS is not a standard Wold forecast error. First of all, the structureof the unbalancedeness changes with time so that the number of variables within themonth is different from month to month. Second, it is affected by the order in whichdata arrive.
The uncertainty associated with this projection, is estimated by
V zqk|vj
= E[(zqk|vj
− zqk)
2], v = k, k − 1, k − 2
Since the dataset is expanding, V zqk|vj
≤ V zqk|vj−1
and the uncertainty is expectedto decrease as time passes by. The evolution of this quantity across data releases
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measures the extent to which each block of releases helps reduce uncertainty of thenowcast of the variables of interest: more informative releases are expected to producelarger reductions in uncertainty. The reduction of uncertainty provides a measure ofthe marginal information content of the jth data release and, in general, of the valueof an increasingly larger information set.
From the practical point of view, the computation of this projection is not simple.Due to the large number of data we are considering, Ωvj is very large. The basicidea of this paper is to exploit the collinearity of the series in our panel to summarizethe information in Ω in a smaller space generated by the span of few common factorsFt. A projection on the space of the common factors Ft is able to capture the bulkof the covariance of the data and provides a parsimonious well performing forecast.Our problem is split in two steps. First, estimate the factors from the panel, Ft|vj
=
Proj[Ft|Ωvj
]. Second, project on the span of the estimated factors. Uncertainty of the
nowcast can hence be attributed to two components
V zqk|vj
= V χqz,k|vj
+ V ξqz,k|vj
.
The first component reflects uncertainty on the common component, i.e. the un-certainty arising from the estimation of the common factors; the second componentreflects uncertainty on the idiosyncratic, i.e. the variance of that part of the variablenot explained by the common factors.
On the basis of the framework outlined here we will also study whether the impact ofa release depends on the fact that it is published early (timeliness) or by its economiccontent (quality). Quality of a block of release is defined as its marginal impact,controlling for the date of the release.
To summarize, our objectives are:
1. Update the current quarter estimate and the forecast of the variables of interest,conditioning on a large set of information.
2. Update on the basis of a panel which at the end of the month is unbalanced.
3. Evaluate “news” in relation to the publication of data releases.
4. Evaluate uncertainty in relation to the flow of information.
5. Evaluate the impact of a release by distinguishing the effect due to timing andthat due to quality.
On the basis of this information, we want to evaluate the marginal contribution ofdifferent blocks of variables to the forecast and assess whether the latter is due of tothe timeliness of the release or to its intrinsic quality.
A model that is suitable to our objectives is defined in the next Section.
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3 The Econometric Methodology
The methodology we will propose here is the parametric dynamic factor model proposedby Doz, Giannone, and Reichlin (2005) and applied by GRS to the same variables weare using here. In this framework, once the parameters of the model are estimatedconsistently through principal components, the Kalman filter is used to update theestimates of the signal and the forecast on the basis of the unbalanced panels.
This parametric version of the factor model can also be used to derive explicitmeasures of data uncertainty across the vintages.
The Kalman filter allows us to extract the innovation content of each data release(composed of several individual data series) and to identify the news – splitting it fromthe noise. The underlying signal is computed by the Kalman filter by weighting theinnovation content of each variable according to its news to noise ratio.
3.1 The Model
While in Section 2 we defined the problem for a generic quarterly variable zqk|vj
, indescribing the model, for simplicity, we will refer to monthly stationary variables. Theappendix describes data transformation and the relation between quarterly and monthlyquantities in detail. Here let us just say that the variable of interest, yit|vj
is the cor-responding monthly series to zq
k|vj, transformed so as to induce stationarity. Obviously
different transformations will be required depending on the nature of the variable inquestion.
We have:
yit|vj= µi + λiFt + ξit|vj
where µi is a constant and χit ≡ λiFt and ξit|vjare two orthogonal unobserved stochastic
processes.1 In matrix notation we can write:
yt|vj= µ + ΛFt + ξt|vj
= µ + χt + ξt|vj
where yt|vj= (y1t|vj
, ..., ynt|vj)′, ξt|vj
= (ξ1t|vj, ..., ξnt|vj
)′, Λ = (λ′1, ..., λ′n)′. We assumethat the n × 1 process χt (the common component) is a linear function of a few un-observed common factors Ft that capture “almost all” comovements in the economy,while the n × 1 stationary linear process ξt|vj
(the idiosyncratic component) is drivenby n variable-specific shocks. Since data revision errors are typically series specific, weincorporate them in the idiosyncratic component. Additionally, the common factorsare supposed to be the same across releases because they summarize the fundamentalstate of the economy underlying all data releases.
The common and idiosyncratic components are identified under the methodologyand assumptions used in estimating the model, as described in section A.3 of theAppendix. The common factors can be consistently estimated by principal components(See Forni, Hallin, Lippi, and Reichlin (2000) and Stock and Watson (2002)) providedthat the idiosyncratic shocks exhibit, at most, “weak” cross-correlations.
1The particular transformations that we use are discussed in Section C of the Appendix.
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Our approach is to specify the the dynamics of the common factors as follows:2
Ft = AFt−1 + But (3.2)
ut ∼ WN(0, Iq) (3.3)
where B is a r×q matrix of full rank q, A is a r×r matrix and all roots of det(Ir−Az) lieoutside the unit circle, and ut is the shock to the common factor and is a white-noiseprocess. In such a model, a number of common factors (r) that is large relative tothe number of common shocks (q) aims at capturing the lead and lag relations amongvariables along the business cycle (cfr. Forni, Giannone, Lippi, and Reichlin (2005) fordetails).
In the empirical estimates, r and q will be set equal to ten and two, respectively.These choices are based on findings in GRS and correspond to the idea that the economycan be described as being driven by q = 2 large pervasive shocks with heterogeneousdynamics captured by the parameter r.
To estimate the factors on the basis of an unbalanced data set, for the idiosyncraticshock we assume:
E(ξ2it|vj
) = ψi =
ψi if yit|vj
is available∞ if yit|vj
is not available.(3.4)
The data generating process of the idiosyncratic components is parameterized by spec-ifying, for available vintages, the following conditions:
E(ξt|vjξ′t|vj
) = diag(ψ1, ..., ψn) (3.5)
E(ξt|vjξ′t−s|vj
) = 0, s > 0. (3.6)
We also assume that ξit|vjis orthogonal to the common shocks ut:
E(ξt|vju′t−s|vj
) = 0, for all s. (3.7)
Our model consists of equations 3.2 through 3.7, and we can use the Kalman filterto estimate the common factors Ft by assuming that errors are Gaussian. If we replacethe parameters of the model above by their consistent estimates (see section A.3 of theAppendix for details), we can estimate the common factors as:
Ft|vj= Proj[Ft | Ωvj ; Λ, A, B, Ψ]. (3.8)
In particular, imposing ψit|vj= ∞ when yit|vj
is missing (see equation 3.4) impliesthat the filter, through its implicit signal extraction process, will put no weight on themissing variable in the computation of the factors at time t.
2The relation of our model to that used in estimating principal components is discussed in SectionA.4 of the Appendix.
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The Kalman filter is also used to evaluate the degree of precision of the factor esti-mates given the consistent parameter estimates, with the degree of precision reflectingthat of the signal extraction process for estimating the factor:
Vs|vj= E[(Ft − Ft)(Ft−s − Ft−s)′; Λ, A, B, Ψ].
Our estimates of the signal and their degree of precision are given by:
χit|vj= Proj[χit | Ωvj ; Λ, A, B, Ψ] = ΛiFt|vj
E(χit − χit|vj)2 = Λ′iV0|vj
Λi
A discussion of the assumptions is in the appendix.
3.2 Forecasts and Uncertainty
Turning to the nowcast, notice that in the state space representation we assume thatonly the common component of each series is forecastable. Empirically, this restrictiondoes not create any relevant loss of information because the common factors are ableto capture not only most of the cross-sectional correlation, but also the bulk of thedynamics of the key aggregates (for evidence on this point, see GRS).
Hence, if yit|vjis not available, because yit has not been released yet at vintage v,
(this is always the case if t > v), then our estimates are given by yit|vj= µi + χit|vj
.On the other hand we assume that if an official estimate for yit|vj
is available, so thatyit has been released at vintage vj , then yit|vj
= yit|vj. More precisely:
yit|vj= Proj[yit|vj
| Ωvj ; Λ, A, B, Ψ] (3.9)
= (1− δit|vj)yit|vj
+ δit|vj(µi + χit|vj
).
where:
δit|vj=
0 if yit|vj
is available1 if yit|vj
is not available
From these equations, as indicated in Section 1, we can compute the news inducedby the release of block j to the nowcast of yit:
NEWS[i, vj ] = yit|vj− yit|vj−1
(3.10)
Because the projections by which these forecasts are calculated assume that theparameters are given, and thus the relative weights in the signal extraction process areunchanged, this measure of news reflects the updating of the factors due only to thenew information in vintage vj , conditional on the information in vintage vj−1. Thismeasure of the news allows us to determine whether particular releases contain relevant
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information in a real-time setting and thus whether it is worthwhile to estimate thesignal at each intra-month data release.
Also, for each vintage, the confidence bands for the forecast can be easily computedfrom the state space representation. Let us consider the difference between the expectedvalue computed at vintage w and the official realized released in the future at date w(w > w). Our measure of uncertainty about this realized value is defined as:
Vyit|w = E[(yit|w − yit|w)2; Λ, A, B, Ψ]. (3.11)
Alternatively, if yit has not been released yet at vintage w, we have:
Vyit|w = E[(χit|w − χit)2; Λ, A, B, Ψ] + E(ξ2it|w)
= Vχit|w + Vξit|w
where Vχjt|w = Λ′iV0|wΛi and Vξjt|w = ψj . Notice that this measure of uncertainty isindependent of w by assumption (cfr. section 3).
On the other hand, if there is an official release of yit at vintage w, we have
Vyit|w = E[(χit|w − χit)2 | y1|w, · · · , yw|w; Λ, A, B, Ψ] + E(ξit|w − ξit|w2)2
where there is no covariance term due to the orthogonality of the factor and the id-iosyncratic term.
This quantity measures the size of the revision error between vintage w and vin-tage w. To estimate it, it is necessary to have an assessment on the evolution ofthe idiosyncratic component at each release E(ξit|w − ξit|w)2. In addition, notice thatE(χit|w−χit)2 will provide a lower bound for the variance of the revisions. For simplic-ity, we will not measure uncertainty due to revision errors, hence we will assume thatE[yit|w − yit|w]2 = 0 if there is an official release of yit at vintage w.3
In summary, we have:
Vyit|vj= δit|vj
(Vχit|vj
+ Vξit|vj
)(3.12)
Notice that there are two sources of uncertainty, one associated with the signal ex-traction problem (extraction of χt), the other due to the presence of idiosyncraticcomponents (ξt).
The appendix detail how to adapt these measures of news and uncertainty to obtainthe statistics described in Section 2.1 for the data of interest transformed in quarterlyrates.
3An analysis of the data revision process will require a separate discussion, and is beyond the scopeof the paper.
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4 Empirics
The measures of news and uncertainty introduced in Section 2 will now be applied tothe real-time vintages of data sets from June 2003 through March 2004 and to thepseudo real-time vintages we have constructed for each of those months, capturing theactual chronological order of the data releases (see again Section 2). We also presentthese measures in a way that controls for the timeliness of the data releases.
4.1 Data
The dataset is described in Table 1. As anticipated in Section 2.1, it consists of about200 macroeconomic indicators and the sample, in each vintage, starts in 1982.
All variables are monthly, except for GDP and GDP deflator for which monthlymeasures are derived from linear interpolation.4 Details on data transformation arereported in Appendix C. Let us here stress that price variables are treated as I(2) inestimation, but results will be reported for the level of inflation.
Table 1 describes the structure of the information within the quarter. Variables(releases) are indicated in Column 2 while Column 1 indicates the associated block.As described in Section 2, we have 15 blocks of releases.5 Different blocks of releasesare published at different dates throughout a month (column 3) and may refer todifferent dates (column 4). Typically, surveys have very short publishing lags and oftenare forecasts for future months or quarters, while GDP, for example, is released with arelatively long delay.6 Industrial production, price variables and others are intermediatecases.
In column 3, we start our “data month” with the Consumer Credit release on the5th business day of the month and end it with the Employment Situation release onthe first Friday of the following month. With this convention, the data set that welabel as June, for example, only includes values for June and earlier, although the datain the latest Labor and Wages block contained in that data set were released in thefirst week of July. After the release of the Labor and Wages block, we track the flowof information within each month by exploiting the fact that our information blockspreserve the chronological ordering of the releases.
As indicated in the third column of Table 1 and anticipated in the discussion ofSection 2, the timing of releases varies somewhat from month to month. To overcomethis problem, we construct pseudo intra-month vintages according to a stylized datarelease calendar, by assigning to the vintages the most common timing pattern andkeeping that timing fixed across our 21 monthly data sets. The construction of the
4Although very simple, this transformation works because it is applied to only a small number ofseries and the distortion is expected to go into the idiosyncratic factor (See Altissimo, Bassanetti,Cristadoro, Forni, Hallin, and Lippi (2001)). In fact, the results in GRS show that the model performsquite well even with such a simple transformation. The procedure might be improved using moresophisticated types of interpolation, that is beyond the scope of the paper.
5Appendix C reports the source of each data release. The individual series in each release (andblock) are reported in Appendix B.
6The releases of the GDP and Income block for the first, second and third months of the quartercontain the GDP and Income data from the “advance”, “preliminary” and “final” releases, respectively.
15ECB
Working Paper Series No 633May 2006
Tab
le1
Blo
ck
Nam
e(1
)R
ele
ase
(2)
Tim
ing
Publish
ing
Fre
quency
(appro
x.)
(3)
Lag
(4)
ofdata
(5)
Mix
ed
1G
.19
Consu
mer
Cre
dit
5th
busi
ness
day
ofm
onth
two
month
sM
onth
lyM
ixed
1A
dvance
Month
lySale
sFor
Reta
iland
Food
Serv
ices
11-1
5th
ofm
onth
one
month
Month
lyM
ixed
1M
onth
lyTre
asu
rySta
tem
ent
ofR
eceip
tsand
Outl
ays
ofth
eU
.S.G
overn
ment
Mid
dle
ofm
onth
one
month
Month
lyM
ixed
1FT
900
U.S
.In
tern
ati
onalTra
de
inG
oods
and
Serv
ices:
Exhib
it5
2nd
full
week
ofm
onth
two
month
sM
onth
lyIP
G.1
7In
dust
rialPro
ducti
on
and
Capacity
Uti
lizati
on
15th
to17th
ofm
onth
one
month
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lyM
ixed
2N
ew
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denti
alC
onst
ructi
on
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toth
e20th
ofm
onth
one
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lyM
ixed
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lR
ese
rve
Bank
ofPhiladelp
hia
Busi
ness
Outl
ook
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ey
3rd
Thurs
day
ofm
onth
curr
ent
month
Month
lyPPI
Pro
ducer
Pri
ces
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dle
ofm
onth
one
month
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lyC
PI
Consu
mer
Pri
ces
Mid
dle
ofm
onth
one
month
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DP
&In
com
eG
DP
-deta
il:
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ries
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ay
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er
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ase
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onth
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DP
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lease
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DP
and
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rLast
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onth
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er
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yG
DP
&In
com
ePers
onalIn
com
eand
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ays
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aft
er
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ase
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lyH
ousi
ng
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ctu
red
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es
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ey
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stbus.
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ousi
ng
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denti
alSale
sLast
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onth
one
month
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lySurv
eys
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hic
ago
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MM
ISurv
ey
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week
ofm
onth
one
month
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lySurv
eys
1C
onsu
mer
Confidence
Index
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ofm
onth
curr
ent
month
Month
lySurv
eys
1M
ichig
an
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ey
ofC
onsu
mers
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.ofth
em
onth
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ent
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lyIn
itia
lC
laim
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laim
s,U
nem
plo
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rance
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ims
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onth
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ent
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rest
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sFre
ddie
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mary
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gage
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ey
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onth
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onth
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ent
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rest
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sH
.15
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cte
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tere
stR
ate
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onth
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onth
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ent
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.10
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ign
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ent
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ce
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ent
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om
merc
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ructi
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inPla
ce
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ixed
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on
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ble
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ctu
rers
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ments
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vento
ries
and
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ers
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/30th
-6th
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month
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lyM
ixed
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Full
Report
on
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ble
Goods
Manufa
ctu
rers
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ments
,In
vento
ries
and
Ord
ers
5days
aft
er
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ble
sone
month
Month
lyM
oney
&C
redit
Consu
mer
Delinq.
Bulleti
nQ
uart
erl
y(s
eri
es
ism
onth
ly)
two
quart
ers
Month
lyM
oney
&C
redit
H.3
Aggre
gate
Rese
rves
ofD
eposi
tory
Inst
ituti
ons
and
the
Moneta
ryB
ase
1st
Thurs
.ofm
onth
curr
ent
month
Month
lyM
oney
&C
redit
H.6
Money
Sto
ck
Measu
res
2nd
Thurs
.ofm
onth
one
month
Month
lyM
oney
&C
redit
H.8
Ass
ets
and
Lia
bilit
ies
ofC
om
merc
ialB
anks
inth
eU
nit
ed
Sta
tes
1st
Fri
.ofm
onth
one
month
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lyLabor
&W
ages
Em
plo
ym
ent
Sit
uati
on
1st
Fri
.ofm
onth
curr
ent
month
Month
ly
16ECBWorking Paper Series No 633May 2006
vintages is discussed in more detail in Section A.1 of the Appendix.Following the notation introduced in Section 2, v0 indexes the vintage just before
the release of the first block (Mixed 1), while v1 indexes the vintage after the releaseof Mixed 1 and before the release of the second block (IP). Just after the Labor andWages release, we have the last vintage of the month, indexed by v15.
With this convention, the starting vintage in each month is equal to the last vintageof the subsequent month: so the vintages indexed by v15 and (v + 1)0 are the same.Because the data blocks defining the vintages are in the same order each month, weuse vj to index both the vintages and the time at which they are released. So, we willsay variables in the first block (Mixed 1) are updated in vintage v1 and are released attime v1.
The way we treat financial variables deserves a comment. Financial variables andinterest rates are the most timely since they are available on a daily basis. In principledaily information could be used to update the estimates of GDP and inflation as, forexample, in Evans (2005). Our approach is different. Since the bulk of our data ismonthly, we disregard information from financial variables at frequencies lower thanthe month and let them enter the model as monthly averages. We make the arbitraryassumption that they become available only at the end of the month which implies thattheir effect is underestimated.
4.2 News and Uncertainty in Real-Time
In this section we report summary statistics evaluated using real time vintages from July2003 to March 2005. These measures are derived using the “real-time” and “pseudo real-time” vintages in their natural chronological order and thus correspond to the exercisein which the forecaster updates her nowcasts after the release of each information block.
We report statistics on uncertainty around the current quarter nowcast of key vari-ables and on the size of the news derived using real time vintages. For real variables,measures of news and uncertainty are constructed for quarterly quantities derived frommonthly data. For inflation variables they are reported for annual inflation. The statis-tics used are based on formulas (3.10) and (3.12), modified so as to track the quarterlyaggregates of interest.
The measure of uncertainty in formula (3.12) depends on the estimated parameters,which change over time because they are recomputed after each vintage of data. Belowwe report averages of the uncertainty measures across all the quarters considered in thereal time exercise. We will refer to this measure as average uncertainty. Similarly, wemeasure the size of the news as the absolute value of the news measure (3.10) averagedacross all the quarters considered in the real time exercise.
Because the impact of the release of block j may differ according to whether therelease is in the first, second or third month of the quarter, the average for bothuncertainty and news is taken over the seven vintages in our sample and correspond toeither to the first, second, or third months of the quarter.
Chart 1, 2 and 3 focus on two key variables: quarterly growth of GDP (Charts 1a,2a and 3a) and annual growth of GDP deflator (Charts 1b, 2b and 3b) while Charts
17ECB
Working Paper Series No 633May 2006
4a and 4b consider, respectively, additional real and nominal indicators.7
Measures of news for real growth and inflation are shown in Charts 1a and 1b,respectively. Charts 2a-2b, 3a-3b and 4a-4b report the evolution of the uncertainty onthe signal (common) and the uncertainty on the variable itself (total). These chartscomplement the information in Chart 1a-1b by providing a systematic measure of howthe accuracy of the nowcast evolves. Chart 2a-2b shows the evolution of the standarderrors over the quarter: by understanding whether the marginal impact of a givenrelease has a different effect in the first month than in later months, we can assess theimportance of timing in explaining the impact of a particular release. Chart 3a-3b,on the other hand, overlays the three months of the quarter to allow for an easiercomparison of the effects of a given block across the three months. Chart 4a-4b reportsthe same information as Chart 2a-2b, but for additional real and nominal series. Theseseries are: employment on nonfarm payroll (NFP), unemployment rate (UR), personalconsumption expenditure price index excluding food and energy (PCEX).
Let us first concentrate on GDP growth. From Charts 1a, 2a and 3a we have threeresults:
1. Intra-month information matters. Data releases throughout the quarter conveynews as can be seen by the fact that the estimates are generally updated as newreleases are published (Chart 1a). Moreover, uncertainty decreases uniformlythrough the quarter (Chart 2a).
2. The release that has the largest impact on the nowcast and its precision in thefirst month is the “Mixed 2” block. Mixed 2 is composed of two series fromthe New Residential Construction Release and nine series from the PhiladelphiaBusiness Outlook Survey. By way of the Philadelphia survey, Mixed 2 is themost timely release since it is the first block to contain data or forecasts on thecurrent quarter. The two preceding releases in the month (Mixed 1 and IndustrialProduction) convey information about earlier months only and have almost noimpact since they are published relatively late.
3. Other important news for the nowcast of real GDP growth is contained in theblocks of Labor and Wages (which includes the release of the Employment Report)and interest rates (the components of the block compose the yield curve). Thisemerges from both Chart 1a and 2a.
In general, the striking result is that the surveys (Mixed 2) have a larger impactthan the Employment Report (Labor and Wages) which is the news to which financialmarkets react more strongly. The reason is that, by the time the labor block is released,the information conveyed by the surveys has already been taken into account. Thishighlights the importance of timing.
Noticeable is also the large effect of the interest rate block on both the nowcastand its uncertainty. The Interest Rate block is the end-of-month average of the weekly30-year mortgage rate from Freddie Mac and of daily observations of nine interest rates
7All statistics are presented numerically in Section D of the Appendix.
18ECBWorking Paper Series No 633May 2006
from the Federal Reserve’s H.15 Release. The later include short and longer-term U.S.Treasury rates and AAA and BAA corporate bond yields. Likewise, the Financial blockis composed of end-of-month averages of daily observations on foreign exchange rates,the price of gold, and U.S. stock prices.
Chart 1a Average Size of News: Nowcasts of Real Growth
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
Mix
ed 1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
I
GD
P &
In
com
e
Ho
usi
ng
Su
rvey
s 1
Init
ial
Cla
ims
Inte
rest
Ra
tes
Fin
an
cia
l
Su
rvey
s 2
Mix
ed 3
Mo
ney
& C
red
it
La
bo
r &
Wa
ges
first month (m=1) second month (m=2) third month (m=3)
Chart 2a Average Uncertainty: Nowcast of Real Growth
0
0.2
0.4
0.6
0.8
1
1.2
1.4
La
bo
r a
nd
Wa
ges
Mix
ed 1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
I
GD
P &
In
com
e
Ho
usi
ng
Su
rvey
s 1
Init
ial
Cla
ims
Inte
rest
Rate
s
Fin
an
cial
Su
rvey
s 2
Mix
ed 3
Mo
ney
& C
red
it
La
bo
r &
Wa
ges
La
bo
r a
nd
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ges
Mix
ed 1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
I
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P &
In
com
e
Ho
usi
ng
Su
rvey
s 1
Init
ial
Cla
ims
Inte
rest
Rate
s
Fin
an
cial
Su
rvey
s 2
Mix
ed 3
Mo
ney
& C
red
it
La
bo
r &
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ges
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bo
r a
nd
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ges
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ed 1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
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P &
In
com
e
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ng
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rvey
s 1
Init
ial
Cla
ims
Inte
rest
Rate
s
Fin
an
cial
Su
rvey
s 2
Mix
ed 3
Mo
ney
& C
red
it
La
bo
r &
Wa
ges
total common
First Month Second Month Third Month
19ECB
Working Paper Series No 633May 2006
Chart 3a Average Uncertainty: Nowcast of Real Growth(Common Component)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
La
bo
r a
nd
Wa
ges
Mix
ed 1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
I
GD
P &
In
com
e
Ho
usi
ng
Su
rvey
s 1
Init
ial
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ims
Inte
rest
Ra
tes
Fin
an
cia
l
Su
rvey
s 2
Mix
ed 3
Mo
ney
& C
red
it
La
bo
r &
Wa
ges
first month (m=1) second month (m=2) third month (m=3)
Chart 4a Average Uncertainty: Nowcast of Alternative Real Variables(Common Component)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Mix
ed 1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
I
GD
P &
In
com
e
Ho
usi
ng
Su
rvey
s 1
Init
ial
Cla
ims
Inte
rest
Ra
tes
Fin
an
cia
l
Su
rvey
s 2
Mix
ed 3
Mo
ney
& C
red
it
La
bo
r &
Wa
ges
Mix
ed 1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
I
GD
P &
In
com
e
Ho
usi
ng
Su
rvey
s 1
Init
ial
Cla
ims
Inte
rest
Ra
tes
Fin
an
cia
l
Su
rvey
s 2
Mix
ed 3
Mo
ney
& C
red
it
La
bo
r &
Wa
ges
Mix
ed 1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
I
GD
P &
In
com
e
Ho
usi
ng
Su
rvey
s 1
Init
ial
Cla
ims
Inte
rest
Ra
tes
Fin
an
cia
l
Su
rvey
s 2
Mix
ed 3
Mo
ney
& C
red
it
La
bo
r &
Wa
ges
GDP NFP UR
First Month Second Month Third Month
20ECBWorking Paper Series No 633May 2006
We now turn to inflation. Let us first remark that, as mentioned, we focus onquarterly growth rate for GDP and on annual rate for what concerns price inflation.The latter is therefore smoother and less sensitive to the news by construction. Thisfeature is evident from Chart 1b. From Chart 2b and 3b we can see that, as in the caseof GDP, uncertainty decreases monotonically within the quarter as new informationarrives. As for the importance of different blocks, two features are noticeable. First,looking at the evolution of the updates of the estimates (Chart 2a), we can see thata big jump occurs with the release of the GDP and Income block in the first monthof the quarter. This release (the “advance” release) contains the first observation forthe GDP deflator (and GDP) for the previous quarter and, thus, reveals informationabout the value of the idiosyncratic shock to the deflator in the previous quarter. Thiseffect, however, is much less pronounced on the common component (the signal) andmainly affects the idiosyncratic component of inflation. This is explained by the factthat, since we have modelled inflation in first differences, the idiosyncratic componenthas a unit root (empirically it turns out to be well captured by a random walk) so thatthe nowcast reacts strongly to the information revealed about the idiosyncratic shockin the previous quarter.
More interestingly, an important impact on the precision of the estimates (Chart 2b)is due to the financial block release, containing data on exchange rates and the nominalprices of gold and equities, whereas, unlike in the case of GDP the interest rate block,has no effect. The Financial block, as we have seen, contributes to a noticeable declinein the uncertainty associated to GDP inflation but not for that associated to real GDP.Conversely, the Interest Rate block has an effect that is much more pronounced for realGDP than for inflation. Notice that the role of financial variables and interest rates islikely to be underevaluated since they are available from the markets on a daily basisbut we assume that they become available only at the end of the month.
To check for the robustness of these results for the Interest Rate and Financialblocks, we perform the same analysis as in Chart 3 but invert the order of these twoblocks. This exercise is motivated by the fact that the order of these two blocks isarbitrary because we constructed them as month-end averages of weekly and dailyobservations which implies that they become available contemporaneously at the endof the calendar month. As shown in Chart 5, the relative impact of these two blocksare not sensitive to their ordering.
While we have focused on GDP inflation and growth, central bankers and economistsat large are also interested in other aggregate measures of inflation and real activity.Measures of uncertainty for the common factor of the nowcast for inflation based onthe core deflator for personal consumption expenditures and for the growth rate ofemployment in nonfarm payrolls and the unemployment rate are presented in Chart 4aand 4b. Notice that the two measures for inflation move closely together, as do thethree measures for real activity. Thus below we will continue to focus on the commonfactor for real GDP and for GDP inflation.
Finally, let us remark that the size of news, unlike the measure of uncertainty,depends on the particular realization over the sample period we use for the out-of-sample exercise. This explains why results on the size of the news are some timedifferent than results on average uncertainty.
21ECB
Working Paper Series No 633May 2006
Chart 1b Average Size of News: Nowcasts of Inflation
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08M
ixed
1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
I
GD
P &
In
com
e
Ho
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ng
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s 1
Init
ial
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ims
Inte
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tes
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s 2
Mix
ed 3
Mo
ney
& C
red
it
La
bo
r &
Wa
ges
first month (m=1) second month (m=2) third month (m=3)
Chart 2b Average Uncertainty: Nowcast of Inflation
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
La
bo
r a
nd
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ges
Mix
ed 1
Ind
. P
rod
uct
ion
Mix
ed 2
PP
I
CP
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s 1
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ial
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ims
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tes
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s 2
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s 1
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ial
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s 2
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ney
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ial
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rvey
s 2
Mix
ed 3
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ney
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it
La
bo
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ges
total common
First Month Second Month Third Month
22ECBWorking Paper Series No 633May 2006
Chart 3b Average Uncertainty: Nowcast of Inflation(Common Component)
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Chart 5a Average Uncertainty Under Alternative Ordering: Real Growth(Common Component)
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Chart 5b Average Uncertainty Under Alternative Ordering: Inflation(Common Component)
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24ECBWorking Paper Series No 633May 2006
4.3 The Information Content of the Blocks Conditional on Timeliness
The marginal impact of a block is conditional on the set of previously released data. Tocontrol for the effect due to timeliness, we construct a counterfactual series of vintagedata sets in which data don’t differ in their timing or lags of releases. In this way wecan construct a measure of “quality” of the data independent of timeliness.
For each of the first three months of 2004, we construct 16 vintages with each vintagecorresponding to one of the information blocks. These 48 vintages are denoted by yt|vj
v = 04m1, ..., 04m3; j = 0, ..., 15. In contrast to the real-time vintages, each of thesecounterfactual vintages is constructed from data in a single real-time vintage (whichwe choose to be yt|v0
, v = 05m3). We then truncate this data set at December 2003,thereby producing a data set that is balanced because the truncation deletes periodswhich may have had missing observations due to lags in releasing data. We denote theseries in this data set as yt,v0 , t = 83m1, ..., 03m11, v = 04m1 and refer to measures ofuncertainty constructed from these series as “no release” measures.
Starting with this balanced dataset, we construct pseudo panels in which each blockis the most timely. For the data set in which the Mixed 1 block is most timely, weadd data for January 2004 but only for variables belonging to Mixed 1, obtaining thecounterfactual vintage yt|v1
.8 Similarly, we start anew with the balanced data set andadd data for January 2004 but only for variables belonging to the second block (IP),obtaining the counterfactual vintage yt|v2
. In the end, we obtain the counterfactualvintages ytvj , for j = 0, ..., 15 and v = 03m1.
Then we do the same exercise with the balanced panel truncated at January 2004,yt|v0
, v = 04m2, and add February 2004 data for each block one by one to constructytvj , for j = 0, ..., 15 and v = 05m2 and so on, up through March. In the end, we obtainyt|vj
, for v = 04m1, ..., 04m3, j = 0, ..., 15.Using these vintages, we construct measures of common-factor uncertainty for the
nowcasts. They are reported in Chart 6a and 6b.9 The horizontal dashed lines aredrawn at the level of the “no release” uncertainty. As it was expected, in each month,each block of information either leaves the average uncertainty of the nowcast un-changed, or reduces it, relatively to the “no release” value.
In Chart 6a we report results for GDP. Industrial production has now become animportant block and so has GDP & Income and Labor and Wages. The importance ofsurveys and interest rates is now reduced.
In Chart 6b we report results for inflation. Compared with Chart 2b, where themain effect was due to surveys, GDP and income and financial variables, we now havea clear effect of the price blocks and of industrial production. The effect of financialvariables remain sizeable while that of surveys is reduced.
In general, hard data become important while they were not in the real time exercise,while soft data have a lower impact which reflects the fact that part of their contributionis mainly due to timeliness.
8The values for January 2004 that we use here, we use values for this month form the vintage,v = 05m3.
9In computing these results, we run the Kalman filter over the various datasets but estimate themodel parameters only once on the basis of the balanced panel (up to September 2004, in this case).Numerical details of these exercises are reported in Tables 4a and 4b.
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We should stress, however, that the effect of financial variables on inflation uncer-tainty remains large and it is therefore independent of timeliness.
Chart 6a Counterfactual Average Uncertainty : Real Growth 2004-Q1(Common Component)
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Chart 6b Counterfactual Average Uncertainty: Inflation 2004-Q1(Common Component)
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26ECBWorking Paper Series No 633May 2006
5 Summary and Conclusion
This paper has analysed the impact of the flow of information within the month onthe estimate of current quarter GDP growth and inflation before these variables arepublished. We considered the unsynchronous release of about 200 monthly time serieswhere releases are organized in groups of homogeneous variables. To this end, we haveproposed a framework which is an adaptation of the parametric version of the largedynamic factor model proposed by GRS and Doz, Giannone, and Reichlin (2005).
This model allows to analyze the flow of a large number of time series and updatethe signal on the basis of a panel which, due to the unsynchronous release of data, isunbalanced at the end of the sample.
We find that information matters in the sense that the precision of the signal in-creases monotonically within the month as new data are released. We also find thatboth timeliness of the release and quality matter for decreasing uncertainty. Surveyshave a large impact on both inflation and output in real time and their effect is largerthan the Employment Report. Hard data such as price and real variables have no effectsince they are released relatively late. When we control for timeliness, the contributionof hard data increases and we find a sizeable effect of both nominal and real variableson inflation while for GDP only real variables matter. Another finding is that interestrates affect the precision of the estimates of GDP, but not that of inflation while assetprices affect the precision of the nowcast of inflation, but not that of GDP.
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References
Altissimo, F., A. Bassanetti, R. Cristadoro, M. Forni, M. Hallin, and Lippi(2001): “EuroCOIN: A Real Time Coincident Indicator of the Euro Area BusinessCycle,” CEPR Discussion Papers 3108.
Bai, J. (2003): “Inferential Theory for Factor Models of Large Dimensions,” Econo-metrica, 71(1), 135–171.
Bernanke, B., and J. Boivin (2003): “Monetary Policy in a Data-Rich Environ-ment,” Journal of Monetary Economics, 50, 525–546.
Boivin, J., and S. Ng (2003): “Are More Data Always Better for Factor Analysis?,”NBER Working Paper 9829, Journal of Econometrics, forthcoming.
(2005): “Understanding and Comparing Factor-Based Forecasts,” NBERWorking Paper 11285.
Doz, C., D. Giannone, and L. Reichlin (2005): “A Maximum Likelihood Approachfor Large Approximate Dynamic Factor Models,” Unpublished manuscript.
Engle, R. F., and M. Watson (1981): “A one-factor multivariate time series modelof metropolitan wage rates,” Journal of the American Statistical Association, 76,774–781.
Evans, M. D. (2005): “Where Are We Now? Real-Time Estimates of the MacroEconomy,” NBER Working Paper 11064, Internationa Journal of Central Banking,forthcoming.
Forni, M., D. Giannone, M. Lippi, and L. Reichlin (2005): “Opening theBlack Box: Structural Factor Models with large cross-sections,” Manuscript,(www.dynfactors.org).
Forni, M., M. Hallin, M. Lippi, and L. Reichlin (2000): “The Generalized Dy-namic Factor Model: identification and estimation,” Review of Economics and Statis-tics, 82, 540–554.
(2003): “The Generalized Dynamic Factor Model: one-sided estimtion andforecasting,” CEPR Working Paper 9829, Journal of the American Statistical Asso-ciation, forthcoming.
Forni, M., and L. Reichlin (2001): “Federal Policies and Local Economies: Europeand the US,” European Economic Review, 45, 109–134.
Giannone, D., L. Reichlin, and L. Sala (2004): “Monetary Policy in Real Time,”in NBER Macroeconomics Annual, ed. by M. Gertler, and K. Rogoff, pp. 161–200.MIT Press.
Marcellino, M., J. H. Stock, and M. W. Watson (2003): “MacroeconomicForecasting in the Euro Area: Country Specific versus Area-Wide Information,”European Economic Review, 47, 1–18.
28ECBWorking Paper Series No 633May 2006
Quah, D., and T. J. Sargent (2004): “A Dynamic Index Model for Large Cross-Section,” in Business Cycle, ed. by J. Stock, and M. Watson, pp. 161–200. Univeristyof Chicago Press.
Stock, J. H., and M. W. Watson (1989): “New Indexes of Coincident and LeadingEconomic Indicators,” in NBER Macroeconomics Annual, ed. by O. J. Blanchard,and S. Fischer, pp. 351–393. MIT Press.
(2002): “Macroeconomic Forecasting Using Diffusion Indexes,” Journal ofBusiness and Economics Statistics, 20, 147–162.
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A Appendix
A.1 Construction of the Vintage Data Sets
We construct the sequence of vintages v1, ..., v15 for a given month v from two data sets:the ones containing all data collected for months v−1 and v (including the EmploymentReport early in the following month). Because these data sets contain the releases ofall 15 information blocks, they are denoted as (v− 1)15 and v15, respectively. The dataset (v − 1)15 is also the initial data set for month v, so (v − 1)15 = v0.
Starting with v0 for month v, the data series in that data set are replaced andupdated recursively block-by-block with blocks that were released in month v (andthat are contained in the data set indexed by v15). For example, v1 is constructed byidentifying the series in Block 1 (Mixed 1) and replacing its values in v0 with those fromv15, while leaving the values for series in all other blocks unchanged. When making suchreplacements, each series in the block is replaced by the new readings on its currentand past values because new releases contain new values not only for the most recentdates, but also for past dates. We call v1 a “pseudo vintage”, because the data seriesin it were not literally constructed in real time, they are constructed from informationblocks that generally preserve the chronological order of the data releases. The pseudovintage v2 is constructed from v1 by identifying all series in Block 2, taking their valuesfrom v15 and using them to replace the values for the series reported in v1 for Block 2.The pseudo vintages v3, v4, ..., v15 are constructed in the analogous manner.
In sum, for each month (v= June, 2003; ... ; March 2005), we have 16 vintagesindexed by (v − 1)15 = v0, v1, ..., v15 = (v + 1)0.
A.2 Transformations of the Data Series
The transformations we apply to the raw data (Yit) so that the model estimation usesdata series that are stationary (yit) are:
Data transformations
code transformation Description0 yit = Yit no transformation1 yit = log Yit log2 yit = (1− L3) Yit three-month difference3 yit = (1− L3) log Yit × 100 three-month growth rate4 yit = (1− L3)(1− L12) log Yit × 100 three-month difference of yearly growth rate
The particular transformation that we apply to a series is reported in column 4 of thetable in Section C of the Appendix.
A.3 Estimation of Parameters
In this section we do not consider the dependence of data on the vintage but insteadwork under the assumption that the data generating process of the idiosyncratic com-ponent is the same across different releases. In particular, we assume homoscedasticity
30ECBWorking Paper Series No 633May 2006
of the idiosyncratic component across vintages, Eξt|vjξ′t|vj
= Ψ for all vj . However, re-laxing this assumption does not have major consequences for the results below becausethe principal component estimator is robust to a limited amount of heteroscedasticity,which could be induced by the data revision process (see e.g. Bai (2003)).
The assumptions that allow us to identify the common and idiosyncratic componentsof the model are:
A1. Common factors are pervasive
lim infn→∞
(1n
Λ′Λ)
> 0,
and
A2. Idiosyncratic factors are non-pervasive
limn→∞
1n
(maxv′v=1
v′Ψv
)= 0.
Assumption A1 implies that the common factors must be understood as sources ofvariation that remain pervasive as we increase the number of series in the dataset. Inthat sense, the common factors correspond to the notion of macroeconomic shocks.Assumption A.2 implies that idiosyncratic factors may affect more than one particularseries (Ψ need not be diagonal, however the idiosyncratic shocks are assumed to bestationary), but the effects of an idiosyncratic shock are limited to a particular clusterand do not propagate throughout the macroeconomy.
Next, we define:
xit = yit − µi
zit =1σi
(yit − µit),
where µit = 1T
∑Tt=1 yit and σi =
√1T
∑Tt=1(yit − µi)2.
Consider the following estimator of the common factors:
(Ft, Λ) = arg minFt,Λ
T∑
t=1
n∑
i=1
(zit − λiFt)2
To derive these estimators, define the sample correlation matrix of the observables (zt):
S =1T
T∑
t=1
ztz′t
Denote by D the r × r diagonal matrix with diagonal elements given the largest reigenvalues of S and denote by V the n × r matrix of the corresponding eigenvectorssubject to the normalization V ′V = Ir. We estimate the factors as:
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Ft = V ′zt
The factor loadings, Λ, and the covariance matrix of the idiosyncratic components,Ψ, are estimated by regressing the variables on the estimated factors:
Λ =T∑
t=1
xtF′t
(T∑
t=1
FtF′t
)−1
= V
and
Ψ = diag(S−VDV).10
The other parameters are estimated by running a VAR on the estimated factors,precisely:
A =T∑
t=2
FtF′t−1
(T∑
t=2
Ft−1F′t−1
)−1
Σ =1
T − 1
T∑
t=2
FtF′t − A
(1
T − 1
T∑
t=2
Ft−1F′t−1
)A′
Define P as the q × q diagonal matrix with the entries given by the largest qeigenvalues of Σ and by M the r × q matrix of the corresponding eigenvectors, then:
B = MP 1/2
The estimates µ, Λ, Ψ, A, B can be shown to be consistent as n, T → ∞. Underassumptions A1 and A2 this is proven in Forni et al. 2005 and, under slightly differentassumptions by Stock and Watson(2002), Bai and Ng(2003) and Giannone, Reichlinand Sala(2003).
For unbalanced panels the parameters of the model, µ,Λ, A, B,Ψ are estimatedusing data up to the last date when the balanced panel is available.
Then we reestimate the factors through the Kalman filter as outlined above in sec-tion 3.1.11 Loosely speaking, the Kalman filter, computes the factors by weightingthe innovation content of each variable (xi,t+1 − E[xi,t+1|x1, ..., xt; Λ, A, B, Ψ]) accord-ingly to its news (the part driven by common shocks ut) to noise (the part driven bycomponents ξit) ratio.
10For any square matrix A, diag(A) is the matrix A with off-diagonal elements set equal to zero. Inestimating Ψ, we estimate only the diagonal elements and set the off-diagonal elements to zero.
11Notice that the parameters Λ, A, Ψ, B can reestimated by OLS on the new factors Ft using theimplied second order moments which can be computed by running the Kalman smoother. This is onestep of the EM algorithm, hence by iterating until convergence, we obtain Maximum Likelihood esti-mates under Gaussian assumptions. Such a procedure has been used by Engle and Watson (1981) andStock and Watson (1989) with an handful of time series to compute coincident and lagging indicators,and by Quah and Sargent (2004) with a larger panel of time series. On the development of this ideaand some theoretical results, see Doz, Giannone, and Reichlin (2005).
32ECBWorking Paper Series No 633May 2006
A.4 Estimation of the common factors: relation to Principal Compo-nents and Weighted Principal Components
Notice that principal components and weighted principal components are a particularcase of the estimates of the common factors derived above. In fact, if we constrainA = 0 and Ψ = 1
n
∑ni=1 ψiIn = ψIn, then the Kalman filter is redundant since the factor
estimated with the Kalman filter step will be proportional to the principal componentsestimates:
Ft = (ψIr + Λ′Λ)−1Λ′xt ∝ V ′zt = Ft
However, if only A = 0 is imposed, then
Ft = (Ir + Λ′Ψ−1Λ)−1Λ′Ψ−1xt,
so the estimated factors are proportional to the weighted principal components, i.e.principal components on the weighted data Ψ−1/2xt.
12
With both principal components and generalized principal components, the esti-mates of the factors are computed by projecting only on the present observations and,thus, the dynamic properties of the factors are not taken into account. In our case,the Kalman filter performs the projection on present and past observations and, thus,takes into consideration the dynamics of the factors and the degree of commonality ofeach time series. However, when running the Kalman filter, we do not exploit the timeseries and cross-sectional correlations of the idiosyncratic shocks which are treated asuncorrelated both in time and in the cross section. Estimates are, however, still con-sistent under the approximate factor structure (Assumption A1 and A2), as shown inDoz, Giannone, and Reichlin (2005).
A.5 Statistics for the Untransformed Data
In general, the measures of news and uncertainty in equations 3.10 and 3.12 apply tomeasures of our data over which the model has been estimated: that is, they apply tomonthly data and to data that has been transformed so as to be stationary. Here wederive such measures that apply to data expressed in ways more commonly used byeconomists.
Series with native frequencies higher than monthly, such as financial and interestrates, are aggregated to monthly frequencies by taking simple within-month averages.And in general, to derive such measures from monthly variables, one or both of twoadjustments need to be made to the measures: 1) to adjust from the model’s monthlyforecasts to quarterly forecasts and 2) to adjust from stationary series to non-stationaryseries. This issues are discussed below.
Case 1: Interpolations All the variables in our model are expressed as monthlyseries; for example monthly growth rates and monthly inflation. Accordingly, the mea-sures of NEWS and uncertainty derived above in the text apply to series of this fre-quency. With most practitioners of monetary policy commonly interested in inflation
12Different versions of such an estimator were proposed by Boivin and Ng (2003), Forni and Reichlin(2001), Forni, Hallin, Lippi, and Reichlin (2003).
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and growth at the quarterly frequency (in part because this is the highest frequency atwhich real GDP and the GDP deflator are published), we transform our measures ofNews and uncertainty to the quarterly frequency.
To set notation, the quarterly measure of variable z will be denoted, as in section,2.1, by:
zqk, k ∈ N.
As an example, consider the case of real GDP. Its quarterly growth rate, defined inthe first equation below, can be expressed in terms of the measure yzt, over which themodel was estimated:
zqk = (log(Yz,k + Yz,k−1 + Yz,k−2)− log(Yz,k−3 + Yz,k−4 + Yz,k−5))× 400
Since variables enter our model as three-month annualized growth rates,
yz,k = (log(Yz,k)− log(Yz,k−3))× 400
Hence, we have:
zqk ∼ (yz,k + yz,k−1 + yz,k−2)/3
where, as stressed above, we have defined the quarter by its last monthWe aggregate the forecast accordingly:
zqk|vj
= yz,k|vj+ yz,k−1|vj
+ yz,k−2|vj,
and derive the measure of “NEWS” in a analogous manner to that of equation 3.10.For the construction of the corresponding uncertainty, we have to take into account
the autocorrelation between the extracted factors, which is summarized in the followingmatrix:
Vs|vj=
V0|vj. . . V ′
s−1|vj
.... . .
...Vs−1|vj
. . . V0|vj
Hence, uncertainty is given by:
V Zq
k|vj= E[(yq
z,k|vj− yq
z,k|vj)2 | y1|vj
, · · · , yvj |vj; Λ, A, B, Ψ]
= (Hz,k|vj⊗ Λz)V2|vj
(Hz,k|vj⊗ Λz)′ + ψzHz,k|vz
H ′z,k|vz
= V χqz,k|vz
+ V ξqz,k|vj
(A.13)
where
Hz,k|vj= [δz,k|vj
, δz,k−1|vj, δz,k−2|vj
]
Case 2: Going from Stationary to Non-Stationary Data For some variables,economists are interested in measures of them that are not stationary. For example,
34ECBWorking Paper Series No 633May 2006
the measure of GDP inflation used in this model is not stationary and was differencedto yield a stationary series with which the model could be estimated. In particular,GDP inflation enters the model as:
yπ,t = ∆3mπt ≡ πt − πt−3
where πt = (log Pt − log Pt−12) × 100 and Pt is the level of the GDP deflator. We areinterested in forecasting annual inflation at a quarterly frequency:
πqk = πk + πk−1 + πk−2, k = 1, 2, ...
As described above in Generic Case 1, we can first change from monthly to quarterlyforecasts of the change of inflation:
πqk − πq
k−3 = ∆qπqk = ∆3mπk + ∆3mπk−1 + ∆3mπk−2
Denoting the by ∆πqk|vj
the estimates made at time vj , our estimates for the level ofinflation are given by:
πqk|vj
= πq0|vj
+k∑
j=1
∆qπq
j|vj
Uncertainty will be measured accordingly as:
V πqk|vj
= E[(πqk|vj
− πqk|vj
)2 | x1|vj, · · · , xvj |vj
; Λ, A, B, Ψ]
= (Hπ,k|vj⊗ Λπ)Vs|vj
(Hπ,k|vj⊗ Λπ)′ + ψπHπ,k|vj
H ′π,k|vj
= V χqπ,k|vj
+ V ξqπ,k|vj
(A.14)
where
Hπ,k|vj= [δπ,k|vj
, δπ,k−1|vj, ..., δπ,k−s|vj
]
and s = k−vj−l where l is the maximum delay for the release of πt, as defined in section2. A similar treatment has been applied to recover the statistics for the unemploymentrate which is treated as non stationary and hence enter our model in differences.
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39ECB
Working Paper Series No 633May 2006
Blo
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Nam
eR
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sTransf
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40ECBWorking Paper Series No 633May 2006
Blo
ck
Nam
eR
ele
ase
Serie
sTransf
orm
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on
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Em
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41ECB
Working Paper Series No 633May 2006
D Tables
Table 2a: Average Size of the news for GDP growth rate
Blocks vb first month (m=1) second month (m=2) third month (m=3)Mixed 1 0.104 0.081 0.081Industrial Production 0.527 0.427 0.531Mixed 2 0.676 0.179 0.127PPI 0.073 0.038 0.050CPI 0.100 0.064 0.056GDP and Income 0.042 0.030 0.071Housing 0.006 0.006 0.009Surveys 1 0.414 0.205 0.135Initial Claims 0.087 0.136 0.058Interest Rates 0.489 0.764 0.583Financial 0.166 0.067 0.076Surveys 2 0.256 0.167 0.112Mixed 3 0.007 0.010 0.004Money & Credit 0.040 0.040 0.037Labor and Wages 0.362 0.241 0.244
Table 2b: Average Size of the news for GDP Deflator inflation
Blocks vb first month (m=1) second month (m=2) third month (m=3)Mixed 1 0.002 0.001 0.001Industrial Production 0.029 0.027 0.023Mixed 2 0.033 0.009 0.015PPI 0.032 0.016 0.018CPI 0.040 0.017 0.017GDP and Income 0.160 0.015 0.032Housing 0.001 0.001 0.001Surveys 1 0.028 0.016 0.012Initial Claims 0.002 0.003 0.002Interest Rates 0.003 0.014 0.019Financial 0.035 0.031 0.021Surveys 2 0.008 0.008 0.006Mixed 3 0.000 0.001 0.000Money & Credit 0.002 0.001 0.001Labor and Wages 0.006 0.010 0.009
42ECBWorking Paper Series No 633May 2006
Table 3a: Average uncertainty for GDP growth ratefirst month (m=1) second month (m=2) third month (m=3)
Blocks total common total common total commonLabor and Wages 1.305 1.004 1.067 0.669 0.902 0.351
(0.027) (0.027) (0.019) (0.018) (0.013) (0.010)Mixed 1 1.303 1.002 1.064 0.665 0.901 0.347
(0.027) (0.027) (0.019) (0.019) (0.013) (0.011)Industrial Production 1.290 0.985 1.043 0.631 0.888 0.311
(0.028) (0.028) (0.018) (0.017) (0.012) (0.009)Mixed 2 1.219 0.890 0.997 0.550 0.873 0.265
(0.024) (0.025) (0.016) (0.016) (0.010) (0.007)PPI 1.219 0.889 0.996 0.550 0.873 0.265
(0.024) (0.026) (0.016) (0.016) (0.010) (0.007)CPI 1.219 0.889 0.996 0.549 0.872 0.264
(0.025) (0.026) (0.017) (0.017) (0.011) (0.007)GDP and Income 1.218 0.889 0.995 0.548 0.872 0.263
(0.025) (0.026) (0.016) (0.016) (0.011) (0.007)Housing 1.218 0.889 0.995 0.548 0.872 0.263
(0.025) (0.026) (0.016) (0.016) (0.011 (0.007)Surveys 1 1.196 0.858 0.982 0.523 0.868 0.248
(0.024) (0.024) (0.016) (0.015) (0.011) (0.006)Initial Claims 1.179 0.834 0.969 0.499 0.863 0.232
(0.028) (0.030) (0.016) (0.014) (0.011) (0.006)Interest Rates 1.110 0.733 0.925 0.406 0.847 0.159
(0.022) (0.022) (0.013) (0.016) (0.011) (0.009)Financial 1.106 0.727 0.922 0.400 0.846 0.156
(0.023) (0.023) (0.014) (0.015) (0.011) (0.009)Surveys 2 1.096 0.712 0.916 0.387 0.844 0.147
(0.021) (0.021) (0.013) (0.012) (0.010) (0.006)Mixed 3 1.096 0.712 0.916 0.386 0.844 0.147
(0.021) (0.021) (0.013) (0.012) (0.010) (0.006)Money & Credit 1.095 0.711 0.916 0.386 0.844 0.146
(0.021) (0.021) (0.013) (0.012) (0.010) (0.006)Labor and Wages 1.072 0.675 0.902 0.351 0.840 0.121
(0.020) (0.019) (0.012) (0.009) (0.009) (0.012)
43ECB
Working Paper Series No 633May 2006
Table 3b: Average uncertainty for GDP deflatorsfirst month (m=1) second month (m=2) third month (m=3)
Blocks total common total common total commonLabor and Wages 0.156 0.062 0.110 0.042 0.105 0.024
(0.007) (0.009) (0.005) (0.006) (0.004) (0.004)Mixed 1 0.156 0.062 0.110 0.042 0.105 0.024
(0.007) (0.009) (0.005) (0.006) (0.004) (0.004)Industrial Production 0.155 0.061 0.109 0.041 0.104 0.023
(0.007) (0.009) (0.005) (0.006) (0.004) (0.004)Mixed 2 0.154 0.056 0.108 0.037 0.104 0.019
(0.007) (0.008) (0.004) (0.005) (0.004) (0.003)PPI 0.153 0.055 0.107 0.036 0.104 0.019
(0.007) (0.008) (0.004) (0.005) (0.004) (0.003)CPI 0.153 0.055 0.107 0.035 0.103 0.018
(0.007) (0.008) (0.004) (0.005) (0.004) (0.003)GDP and Income 0.115 0.054 0.107 0.035 0.103 0.018
(0.006) (0.008) (0.004) (0.005) (0.004) (0.003)Housing 0.115 0.054 0.107 0.035 0.103 0.018
(0.006) (0.008) (0.004) (0.005) (0.004) (0.003)Surveys 1 0.113 0.051 0.106 0.033 0.103 0.016
(0.006) (0.007) (0.004) (0.005) (0.004) (0.003)Initial Claims 0.113 0.051 0.106 0.032 0.103 0.015
(0.006) (0.007) (0.004) (0.004) (0.003) (0.002)Interest Rates 0.113 0.050 0.106 0.031 0.103 0.014
(0.005) (0.007) (0.004) (0.004) (0.003) (0.002)Financial 0.109 0.042 0.104 0.024 0.102 0.010
(0.005) (0.006) (0.004) (0.003) (0.003) (0.001)Surveys 2 0.109 0.041 0.104 0.024 0.102 0.010
(0.005) (0.006) (0.004) (0.003) (0.003) (0.001)Mixed 3 0.109 0.041 0.104 0.024 0.102 0.010
(0.005) (0.006) (0.004) (0.003) (0.003) (0.001)Money & Credit 0.109 0.041 0.104 0.024 0.102 0.010
(0.005) (0.006) (0.004) (0.003) (0.003) (0.001)Labor and Wages 0.109 0.041 0.104 0.023 0.102 0.009
(0.005) (0.006) (0.004) (0.003) (0.003) (0.001)
44ECBWorking Paper Series No 633May 2006
Table 4a: Uncertainty for GDP growth rate (04Q1) (counterfactual)v = 04m1 v = 04m2 v = 04m3
Blocks common total common total common totalno release 0.861 1.189 0.554 0.990 0.271 0.864Mixed 1 0.784 1.135 0.488 0.954 0.230 0.852Industrial Production 0.570 0.998 0.285 0.868 0.079 0.824Mixed 2 0.733 1.100 0.446 0.933 0.205 0.845PPI 0.837 1.172 0.536 0.980 0.261 0.860CPI 0.820 1.159 0.522 0.972 0.253 0.858GDP and Income 0.608 1.021 0.331 0.884 0.000 0.000Housing 0.825 1.163 0.525 0.973 0.254 0.858Surveys 1 0.734 1.101 0.446 0.934 0.204 0.845Initial Claims 0.803 1.148 0.505 0.963 0.241 0.855Financial 0.837 1.171 0.535 0.979 0.260 0.860Interest Rates 0.715 1.088 0.422 0.922 0.184 0.840Surveys 2 0.736 1.102 0.449 0.935 0.207 0.846Mixed 3 0.750 1.111 0.456 0.938 0.209 0.846Money & Credit 0.835 1.170 0.532 0.977 0.258 0.860Labor and Wages 0.641 1.041 0.357 0.894 0.140 0.832
Table 4b: Uncertainty for GDP deflators (04Q1) (counterfactual)v = 04m1 v = 04m2 v = 04m3
Blocks common total common total common totalno release 0.055 0.110 0.035 0.101 0.018 0.097Mixed 1 0.054 0.109 0.035 0.101 0.017 0.096Industrial Production 0.043 0.104 0.025 0.098 0.011 0.096Mixed 2 0.052 0.108 0.032 0.100 0.015 0.096PPI 0.039 0.103 0.022 0.097 0.011 0.096CPI 0.036 0.102 0.020 0.097 0.009 0.095GDP and Income 0.040 0.103 0.023 0.098 0.000 0.000Housing 0.053 0.109 0.034 0.101 0.017 0.096Surveys 1 0.052 0.108 0.032 0.100 0.016 0.096Initial Claims 0.055 0.109 0.035 0.101 0.017 0.096Financial 0.041 0.103 0.024 0.098 0.012 0.096Interest Rates 0.053 0.109 0.034 0.101 0.017 0.096Surveys 2 0.052 0.108 0.032 0.100 0.015 0.096Mixed 3 0.052 0.108 0.033 0.101 0.017 0.096Money & Credit 0.054 0.109 0.034 0.101 0.017 0.096Labor and Wages 0.049 0.107 0.030 0.100 0.014 0.096
45ECB
Working Paper Series No 633May 2006
46ECBWorking Paper Series No 633May 2006
European Central Bank Working Paper Series
For a complete list of Working Papers published by the ECB, please visit the ECB’s website(http://www.ecb.int)
585 “Are specific skills an obstacle to labor market adjustment? Theory and an application to the EUenlargement” by A. Lamo, J. Messina and E. Wasmer, February 2006.
586 “A method to generate structural impulse-responses for measuring the effects of shocks instructural macro models” by A. Beyer and R. E. A. Farmer, February 2006.
587 “Determinants of business cycle synchronisation across euro area countries” by U. Böwer andC. Guillemineau, February 2006.
588 “Rational inattention, inflation developments and perceptions after the euro cash changeover”by M. Ehrmann, February 2006.
589 “Forecasting economic aggregates by disaggregates” by D. F. Hendry and K. Hubrich,February 2006.
590 “The pecking order of cross-border investment” by C. Daude and M. Fratzscher, February 2006.
591 “Cointegration in panel data with breaks and cross-section dependence” by A. Banerjee andJ. L. Carrion-i-Silvestre, February 2006.
592 “Non-linear dynamics in the euro area demand for M1” by A. Calza and A. Zaghini,February 2006.
593 “Robustifying learnability” by R. J. Tetlow and P. von zur Muehlen, February 2006.
594 “The euro’s trade effects” by R. Baldwin, comments by J. A. Frankel and J. Melitz, March 2006
595 “Trends and cycles in the euro area: how much heterogeneity and should we worry about it?”by D. Giannone and L. Reichlin, comments by B. E. Sørensen and M. McCarthy, March 2006.
596 “The effects of EMU on structural reforms in labour and product markets” by R. Duvaland J. Elmeskov, comments by S. Nickell and J. F. Jimeno, March 2006.
597 “Price setting and inflation persistence: did EMU matter?” by I. Angeloni, L. Aucremanne,M. Ciccarelli, comments by W. T. Dickens and T. Yates, March 2006.
598 “The impact of the euro on financial markets” by L. Cappiello, P. Hördahl, A. Kadarejaand S. Manganelli, comments by X. Vives and B. Gerard, March 2006.
599 “What effects is EMU having on the euro area and its Member Countries? An overview”by F. P. Mongelli and J. L. Vega, March 2006.
600 “A speed limit monetary policy rule for the euro area” by L. Stracca, April 2006.
601 “Excess burden and the cost of inefficiency in public services provision” by A. Afonsoand V. Gaspar, April 2006.
602 “Job flow dynamics and firing restrictions: evidence from Europe” by J. Messina and G. Vallanti,April 2006.
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Working Paper Series No 633May 2006
603 “Estimating multi-country VAR models” by F. Canova and M. Ciccarelli, April 2006.
604 “A dynamic model of settlement” by T. Koeppl, C. Monnet and T. Temzelides, April 2006.
605 “(Un)Predictability and macroeconomic stability” by A. D’Agostino, D. Giannone and P. Surico,April 2006.
606 “Measuring the importance of the uniform nonsynchronization hypothesis” by D. A. Dias,C. Robalo Marques and J. M. C. Santos Silva, April 2006.
607 “Price setting behaviour in the Netherlands: results of a survey” by M. Hoeberichts andA. Stokman, April 2006.
608 “How does information affect the comovement between interest rates and exchange rates?”by M. Sánchez, April 2006.
609 “The elusive welfare economics of price stability as a monetary policy objective: why NewKeynesian central bankers should validate core inflation” by W. H. Buiter, April 2006.
610 “Real-time model uncertainty in the United States: the Fed from 1996-2003” by R. J. Tetlowand B. Ironside, April 2006.
611 “Monetary policy, determinacy, and learnability in the open economy” by J. Bullardand E. Schaling, April 2006.
612 “Optimal fiscal and monetary policy in a medium-scale macroeconomic model”by S. Schmitt-Grohé and M. Uribe, April 2006.
613 “Welfare-based monetary policy rules in an estimated DSGE model of the US economy”by M. Juillard, P. Karam, D. Laxton and P. Pesenti, April 2006.
614 “Expenditure switching vs. real exchange rate stabilization: competing objectives forexchange rate policy” by M. B. Devereux and C. Engel, April 2006.
615 “Quantitative goals for monetary policy” by A. Fatás, I. Mihov and A. K. Rose, April 2006.
616 “Global financial transmission of monetary policy shocks” by M. Ehrmann and M. Fratzscher,April 2006.
617 “New survey evidence on the pricing behaviour of Luxembourg firms” by P. Lünnemannand T. Y. Mathä, May 2006.
618 “The patterns and determinants of price setting in the Belgian industry” by D. Cornilleand M. Dossche, May 2006.
619 “Cyclical inflation divergence and different labor market institutions in the EMU”by A. Campolmi and E. Faia, May 2006.
620 “Does fiscal policy matter for the trade account? A panel cointegration study” by K. Funkeand C. Nickel, May 2006.
621 “Assessing predetermined expectations in the standard sticky-price model: a Bayesian approach”by P. Welz, May 2006.
48ECBWorking Paper Series No 633May 2006
622 “Short-term forecasts of euro area real GDP growth: an assessment of real-time performancebased on vintage data” by M. Diron, May 2006.
623 “Human capital, the structure of production, and growth” by A. Ciccone andE. Papaioannou, May 2006.
624 “Foreign reserves management subject to a policy objective” by J. Coche, M. Koivu, K. Nyholmand V. Poikonen, May 2006.
625 “Sectoral explanations of employment in Europe: the role of services” by A. D’Agostino,R. Serafini and M. Ward-Warmedinger, May 2006.
626 “Financial integration, international portfolio choice and the European Monetary Union”by R. A. De Santis and B. Gérard, May 2006.
627 “Euro area banking sector integration: using hierarchical cluster analysis techniques”by C. Kok Sørensen, J. M. Puigvert Gutiérrez, May 2006.
628 “Long-run money demand in the new EU Member States with exchange rate effects”by C. Dreger, H.-E. Reimers and B. Roffia, May 2006.
629 “A market microstructure analysis of foreign exchange intervention” by P. Vitale, May 2006.
630 “Implications of monetary union for catching-up member states” by M. Sánchez, May 2006.
631 “Which news moves the euro area bond market?” by M. Andersson, L. J. Hansen andS. Sebestyén, May 2006.
632 “Does information help recovering structural shocks from past observations?”by D. Giannone and L. Reichlin, May 2006.
633 “Nowcasting GDP and inflation: the real-time informational content of macroeconomic datareleases” by D. Giannone, L. Reichlin and D. H. Small, May 2006.
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