with my money on my mind: income, happiness and intrusive … · and positive (stevenson &...
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With my money on my mind: income, happiness and intrusive financial thoughts
Paul Dolan1 and Robert Metcalfe2
1 London School of Economics
2 University of Oxford
Abstract
Richer people are more satisfied with their lives than poorer people but are no happier with their
daily experiences. We replicate these findings in the first ever panel dataset using the day
reconstruction method (DRM). We find that richer people, however, are more satisfied with their
days and less likely to be very unhappy. We also demonstrate that poorer people are more likely
to report negative intrusive thoughts about money and having these thoughts is associated with
lower life satisfaction and daily happiness. Interestingly, richer people are more adversely
affected in the DRM by each negative thought about money. Intrusive thoughts have not been
properly accounted for in reports of happiness to date. More research is needed on how positive
and negative thoughts about money, health, family etc. affect happiness and how these thoughts
may affect the relationship between happiness and its various determinants, including income.
Keywords: intrusive thoughts; income; experienced utility
JEL Classification: D0
Acknowledgements We thank Anja Göritz, Anthony Mee and Sabine Pahl for help with programming, translation and data collection. Andrew Oswald, Daniel Gilbert, Nick Powdthavee and Ivo Vlaev all provided helpful comments. Matthew White was involved in the design of the study and so is owed a very special thank you.
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1. Introduction
An increasingly prominent topic in economics is the relationship between income and happiness
(Blanchflower & Oswald, 2004; Easterlin, 2001; Frank, 1999; Frey & Stutzer, 2002; Layard,
2006). Most of the research has focussed on comparisons between the log of household income
and life satisfaction ratings, which ask respondents to consider their life as a whole (Dolan et al,
2008). Despite countless studies and several reviews, there is still no consensus about the nature
of this relationship (Clark et al, 2008) although the best evidence to date suggests it is moderate
and positive (Stevenson & Wolfers, 2008; Kahneman & Deaton, 2010; Pischke, 2011).
An alternative approach to measuring happiness, and one closer to Jeremy Bentham's original
conception of utility, is to measure experienced utility as the flow of feelings over time
(Kahneman et al, 1997). The Day Reconstruction Method (DRM) is an innovative approach to
measuring the experienced utility associated with daily activities. It asks people what activities
they were engaged in during the previous day, how long these lasted and how they felt during
them (Kahneman et al, 2004). Further work using the DRM has examined the difference between
affect and reward (White & Dolan 2009), and the difference between life satisfaction and affect
for those who are unemployed versus employed (Knabe et al, 2009). The activity-related
emotions can then be weighted by their duration to produce a profile of experienced utility over
the course of an entire day. From DRM data on Texan women, Kahneman et al (2006) found no
significant relationship between household income and experienced utility – despite respondents
with higher incomes reporting higher life satisfaction.
This discrepancy has been explained as an example of a focussing illusion whereby people focus
their attention on income when evaluating their lives but pay far less attention to it in the actual
experience of their lives (Kahneman et al, 2006; Schkade & Kahneman, 1998; Wilson & Gilbert,
2003). Richer women's actual experiences were possibly no better because, according to their
time use data, they spent more time in relatively less pleasant activities, such as work and
commuting. Kahneman et al (2006) conclude that "the belief that high income is associated with
good mood is widespread but illusory" (p.1908).
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Yet the DRM's attempt to capture experienced utility may have created a focussing effect of its
own by asking respondents to report their feelings when thinking about the activities in their
lives. As such, it may have neglected the way in which our attention drifts between current
activities and concerns about other things. Research in psychology suggests such "mind
wanderings" are frequent, occurring in up to 30% of randomly sampled moments during an
average day (Smallwood & Schooler, 2006). When these mind-wanderings repeatedly return to
the same issues, they are labelled intrusive thoughts and they often have a negative association
with our experienced utility (Watkins, 2008; Killingsworth & Gilbert, 2010). It has also been
found that such thoughts have a large impact on the valuation of health states (Dolan, 2010).
So far as we are aware, intrusive thoughts have been researched by psychologists in clinical
settings (Watkins, 2008). It is plausible that intrusive financial thoughts (IFTs) may be more
frequent amongst poorer people in the general population and there may therefore be a stronger,
positive relationship between income and experienced utility when we account for these
thoughts. IFTs have not been previously investigated in general population samples, which is
somewhat surprising given that money worries are one the most common everyday concerns
(MacGregor, 1991). Moreover, the DRM studies to date have been cross-sectional (Kahneman et
al, 2004; Knabe et al, 2010) and have therefore been unable to control for unobserved variables
that might lead to biased estimates of experience utility.
In a DRM panel study in Germany, we test whether IFTs are related to lower levels of happiness
(life satisfaction and experienced utility). Because people who have IFTs may be of a more
worried disposition to begin with, we also ask about intrusive thoughts for a range of other
domains (e.g. health). If IFTs remain significant controlling for a general tendency to report
intrusive thoughts then this would provide stronger evidence for the impact of IFTs. Our results
suggest that negative IFTs matter for happiness (as defined by all measures), in that those who
report IFTs have lower levels of happiness, even controlling for individual heterogeneity and the
tendency to report other intrusive thoughts. We also find that each IFT has a greater effect on the
experienced utility of richer people, and that including negative IFTs in a life satisfaction
regression reduces the size of the income coefficient, enabling us to reconcile the results between
life satisfaction and DRM Affect.
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2. Methods
Participants were recruited via a web-based internet panel run from a German University in
2007. Of the 1,825 people who accessed the study's site for more details, 625 (34%) completed
the study. This response rate is normal for this and other panels (Göritz, 2007) and provided a
highly heterogeneous sample. In 2008, 169 people who completed the DRM survey (see Table 1
for the summary statistics of the 169 panel sample). Household income was measured using nine
categories with increments of €20,000, so the mid-point of each category was used and raw
scores were log-transformed.
Following Kahneman et al (2004), respondents began by completing a diary of their previous
day. For each episode, they were asked to select what they were doing, from a list of 24 activities
(e.g. eating), say who they were with, from a list of twelve (e.g. boss), and how long the episode
lasted. They were also asked the extent to which they felt a number of emotions on scales from 0
(Not at all) to 6 (Very much). For consistency with Kahneman et al (2004), we calculate a DRM
Affect by weighting the average of the positive affect terms (happy, engaged, content) minus the
average of the negative affect terms (worried, tired, nervous). For consistency with Kahneman &
Krueger (2006) and Knabe et al (2010), we also calculate a DRM U-index, which is the
proportion of each person’s time engaged in an activity for which dominant (highest scoring)
emotion was negative. This is reverse coded in the data, so higher coefficients in the regressions
suggest a higher likelihood of being unhappy.
Respondents were then asked about intrusive thoughts: “So far you have described certain
episodes during your day and how you felt. However, perhaps certain thoughts kept popping into
your head during the day which had little to do with the activities you were engaged in. In this
section we would like you to say if you had any of these thoughts (positive or negative) during
the day." They were then asked: "Was there something positive or pleasant that kept popping
into your head during the day and which made you happy when you thought about it? yes or no.
If yes then what were these thoughts about?” There were ten domains to select from: finances,
work, holidays, family, health, dreams, travel, hobbies, events, and other thoughts. A similar
question then asked about the prevalence of any "negative or unpleasant" intrusive thoughts.
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Respondents were then asked about their life satisfaction and day satisfaction on a seven point
scale. We include day satisfaction since it is an evaluation of yesterday, which compares nicely
with the experiences of yesterday elicited using the DRM. It also provides a nice comparison
with life satisfaction since life satisfaction has no temporal restriction whereas day satisfaction
does. We use pooled regressions, random effects regressions and fixed effect regressions for the
analysis, but the latter may not be well defined because of only using the two time points. For all
analyses, all measures are on a zero to one scale. We use 5% significance levels throughout.
3. Results
Table 1 shows the summary statistics of the panel sample. It is clear that there are some
similarities across the two time periods. Over half of the sample does not have children; the
average household income is €42,392 in 2007 and €44,430 in 2008. The average level of
intrusive thoughts is similar across both time periods. Life satisfaction decreases from 2007 to
2008 but day satisfaction increases over the same time period – these results are not significant at
the five per cent level though. DRM Affect decreases over the same period and this is significant
at the five per cent level.
For the regressions that follow, all coefficients have been changed into a 0-1 scale to ease
comparability across the measures. The DRM U-index has been reverse coded to be consistent
with the other coefficients, so those coefficients that are positive suggest a lower likelihood of
being unhappy. Table 2 examines the initial relationship between income and the happiness
measures using pooled and random effects models. This is important to examine as we have the
first panel DRM dataset to examine the impact of income on experienced utility. For life
satisfaction, income is positive and significant for the pooled regressions, but not significant for
the random effects regressions, although the coefficient is positive. For day satisfaction, income
is positive and significant for both models. DRM affect has a positive relationship with income
but is not significant and DRM U-index is positive and significant for the pooled model. So
richer people tend to be more satisfied with their lives and days, and that richer people tend to
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have better experiences during the days. It is interesting that income is important to day
satisfaction, and more important than in the life satisfaction – income relationship.
We firstly go through the basic associations of the financial thoughts for the sample across both
time periods. Bar graph 1a illustrates the IFTs by income in 2007. Negative IFTs (light grey
(blue) bars) are more frequent than positive thoughts (dark grey (red) bars), and both are more
frequent for those with lower incomes. So for those who have annual incomes of €70,000 or less,
around 12-15% of this sample have some negative IFTs. Bar graph 1b illustrates the IFTs by
income in 2008 and shows that those who had very low incomes or very high incomes were
more likely to have negative IFTs. For those on annual incomes of €10,000 and €130,000, 20%
of this sample has negative IFTs, and around 7.5% of people have negative IFTs for incomes
between €30,000 and €90,000. As before, positive IFTs are more frequent for those with low
incomes.
Bar graph 2A shows the measures of happiness by income in 2007. There is no clear relationship
between happiness and income. For life satisfaction and day satisfaction, those on €90,000 have
the highest wellbeing. For DRM Affect, those on €110,000 have the highest wellbeing.
Interestingly, those on the highest income level (€150,000 and above), 30% have unhappy days
(in that the negative effect is at least the same as positive affect).
Bar graph 2B shows the measures of happiness by income in 2008. The satisfaction measures
increase slightly with income. For life satisfaction, those earning €110,000 have the highest life
satisfaction and highest day satisfaction. Those who have the highest DRM Affect are those who
are earning the highest incomes.
Tables 3a-3c examine the relationship between the measures of happiness and the negative and
positive intrusive financial thoughts. Table 3a examines the basic correlation between the
measures of happiness and IFTs, using pooled OLS. It is clear that negative IFTs are bad for
every measure of happiness apart from the U-index (where a negative coefficient means that the
person is more likely to be unhappy). The largest negative correlation is between IFTs and life
satisfaction. That is, having negative IFTs is associated with 17.4% lower life satisfaction. The
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positive IFTs associations are also interesting, since positive thoughts about finances are not
significantly positively associated with greater life satisfaction, day satisfaction, DRM Affect
and DRM U-index. This is consistent with recent research in this area (see Killingsworth &
Gilbert, 2010). Table 3b uses the same specification but the econometric structure is using the
panel nature of the data using random effects. There are similar results here from the pooled
regressions but the coefficients are not so large.
Table 3c uses the same specification but uses a fixed effects econometric structure. The
association between negative IFTs and life satisfaction is also reduced but it is still large: a 12%
reduction of life satisfaction if one thinks negatively about their finances. The sign of the other
measures of happiness change (from negative to positive) or are reduced through using the fixed
effects structure. Positive IFTs are positively associated with life satisfaction and day
satisfaction, but negatively correlated with the experience measures, i.e. DRM Affect and the U-
index, although the correlation is very small for the U-index.
Tables 4a – 4c examine the same relationship but include household income as a control variable
(in the same way as Table 2). The reason why income is included here is because we want to
determine the magnitude of IFTs when we control for the level of income of the individuals. It is
clear from these regressions that the sign and magnitude of the IFTs coefficients do not change.
So controlling for the level of income does not change the average magnitude of the impact of
IFTs on happiness. What is interesting here is that household income coefficients do not change
from those stated in table 2, in that income comes into the panel regressions as positive for
experiences. For life satisfaction, however, the coefficient on income is lower when negative
IFTs are included in the model (compare 0.042 in Table 2 with 0.035 in regression 1 in table 4a:
difference 0.007, p>0.05). This result supports the work of Dolan (2010) who finds that
controlling for thoughts about health reduces the impact of health states on health preferences.
Nonetheless, the coefficient on negative IFTs for life satisfaction is still overall large across all
models (12-17%), suggesting the importance of IFTs for life satisfaction.
Tables 5a – 5c include an interaction term between the IFTs and household income. We will
focus here on the interaction terms since they are demonstrating the interaction between income
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and the IFT. This will enable us to determine whether those who earn more income suffer more
from financial thoughts than those on lower incomes. So for negative IFTs, if the interaction
term (IFT x income) is negative, it means that the richer individuals are more affected by the
negative IFTs than poorer individuals, and conversely if the interaction term is positive, then
poorer individuals are more negatively affected than richer individuals. It seems that for life
satisfaction, the interaction term is positive and significant. So, poorer individuals who have
negative IFTs are more negatively impacted in life satisfaction assessments than those richer
individuals who have negative IFTs. For day satisfaction, we find the opposite associations. The
interaction term for negative IFTs is negative and significant. This suggests that richer
individuals who have negative IFTs are more negatively impacted than those poorer individuals
who have negative IFTs. For the DRM measures, the interaction terms are not significant.
Table 5c examines the same specification as Table 5b, but includes a fixed effect. It is clear that
the life satisfaction result (that less well off people are more negatively impacted by negative
IFTs) diminishes, but the negative coefficient on the interaction term for day satisfaction
increases in magnitude and is significant. From regressions (3) and (5), it is clear that negative
IFTs are worse for richer individuals than poorer individuals. For positive IFTs, they seem to
generally have a higher impact on richer individuals than poorer individuals, especially for day
satisfaction (see regression 3). For the U-index, positive IFTs are worse for richer individuals
than poorer individuals (see regression 8).
Tables 6a – 6c includes time-varying background variables of the respondent such as marital
status and whether they have children, and includes other intrusive thoughts – these are intrusive
thoughts about health, family, work, friends, and dreams. Therefore this helps us to pick up any
missing associations between financial thoughts and background variables and thoughts about
another domain. Life satisfaction and day satisfaction are still negatively impacted by intrusive
IFTs, and more so for richer individuals. So once we control for other negative thoughts about
other domains and time-varying background variables, financial worries become much more
prominent, especially amongst those who have money. The results for DRM Affect and DRM U-
index are similar although not significant.
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4. Discussion
Previous research in the economics of happiness has found a relatively robust, though moderate,
positive relationship between household income and life satisfaction (Clark et al, 2008;
Stevenson & Wolfers, 2008). Kahneman et al (2006), however, claimed that this relationship was
due to a focussing illusion i.e. the false belief that more money should be related to greater
happiness rather than being a reflection of the actual experiences of richer and poorer
individuals. Evidence supporting their claims came from a diary study of the previous day which
found that while income had a positive relationship to life satisfaction and people's estimates of
the amount of time spent in a good mood, there was no relationship with the actual amount of
happiness experienced.
The current research, using the same basic method with a different sample, has replicated these
findings. We suggest, however, that the diary method focuses the respondent's attention on
activities neglecting any intrusive thoughts they may have had. Since such thoughts can take up a
considerable amount of our time and are known to affect our experienced utility (Kane et al,
2007; Smallwood & Schooler, 2006; Watkins, 2008), this appears to have been an important
omission. Moreover, given that finances are also known to be one of the chief sources of daily
worries (MacGregor, 1991), it seemed plausible that experienced utility may be related to the
presence of intrusive financial thoughts (IFTs). In particular, we suspected that negative thoughts
about money would be related to lower levels of experienced utility across an average day.
Consistent with these predictions, negative IFTs were more prevalent among poorer respondents.
That the prevalence of these other thoughts was also negatively related to experienced utility
further supports our contention that experienced utility is composed of the thoughts that occupy
us as well as the activities we engage in. We report that having negative IFTs is associated with
around a 15% reduction in life satisfaction. That association is larger than most of the current
correlates of life satisfaction in the literature. The results suggest that while poorer individuals
report more negative IFTs, their impact on various SWB measures is larger for those individuals
who are richer. This result might go some way to explain the hedonic treadmill: If people who
have higher income are those who worry more about their income, then this negatively impacts
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on their SWB. Our method only focussed on frequency of thought and not on intensity. So it
might be that those who are richer have more intense negative thoughts. Or wealthy people might
be more affected by IFTs simply because they have fewer of them: if a person is not used to
worrying about money, each episode of worry may be less familiar and more alarming.
We also find that including negative IFTs in the life satisfaction regression reduces the income
coefficient. This is extremely important to the reconciliation between the results of life
satisfaction and DRM Affect. We propose that negative IFTs act as a potentially omitted
variable. Clearly, the sign of the omitted variables bias is the product of the sign of the
relationship between IFTs and life satisfaction, and IFTs and income. We find that negative IFTs
reduce life satisfaction (negative sign), and that we find a higher impact of IFTs for those on
higher incomes (positive sign). This implies that the sign of the omitted variables bias is
negative, i.e. controlling for ITFs should reduce the effect of household income on life
satisfaction – which is what we find. These IFTs might be very important for the reconciliation
of the results of income for life satisfaction and DRM Affect. Therefore, the inclusion of IFTs
into the model brings the larger income coefficient in the life satisfaction regressions closer to
the smaller income coefficient in the DRM Affect regressions. It is possible that IFTs are the
‘missing link’ in the relationship between happiness and income.
The upshot of this result is that people who worry or have more negative thoughts about money
believe that income is important to their life satisfaction. Moreover, people who do not
negatively worry about money believe that income is not that important to their life satisfaction.
This is consistent with the work of Dolan (2010) who found that the inclusion of health thoughts
in health preference regressions reduces the effect of health states on overall preferences. This is
also consistent with the work of Dolan and Metcalfe (2011), who found that the domains of life
that people think matter most (e.g. finances, health, work, etc) actually have lower satisfaction in
those domains. So our results here are consistent with this work in that those who think more
about negatively about finances (analogous to less satisfied with this domain) believe that
income matters more to their life satisfaction.
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The IFT results are consistent with related research in the field. Borooah (2005), for instance,
reports that needing to borrow money mid-week increases the chances of being "unhappy", and
Brown et al (2005) find that symptoms such as depression and anxiety are more widespread
among people with unsecured debts. In other words, day-to-day emotional experiences do seem
to be related to financial problems. The current research extends these findings by showing that
these problems can intrude on people's thoughts during their normal activities and can thus have
an effect on their utility. Even when we control for a host of other intrusive thoughts, IFTs are
still highly associated with life satisfaction and day satisfaction.
Related to this is the finding that positive thoughts about money are not necessarily positive for
people’s experienced utility. This is consistent with Killingsworth and Gilbert’s (2010) research
that showed that any mind wanderings have a negative impact on experiences. So, when
individuals think about money (both negatively and positively), this removes people from the
experience of the episode, and removes their ‘flow’ (Csíkszentmihályi, 1990). When individuals
are not fully engaged in the activity, their attention is directed to thoughts that might have little to
do with the activity. How such thoughts arise in some activities, and how interventions,
workplaces, public policies etc. can be constructed to direct attention to the activity as opposed
to mind wanderings, all require further investigation.
The intrusive thoughts could be involuntary (to some great degree outside of our control) as well
as voluntary (things that we choose to think about). We know very little about the relative impact
of different attentional types on intrusive thoughts. There is an increasing amount of work on
attention shaping choices, but mostly in relation to voluntary attention (see Chetty et al, 2009;
DellaVigna & Pollet, 2009; Hirschliefer, 2009). We do not suggest that our approach is the best
to elicit thoughts or understand attention, but future DRM type studies could certainly ask
respondents about thoughts and feelings before asking about them what they are doing and who
they are with. It may be that asking people about their main activity before asking them about
their mood draws their attention away from what they were thinking about and such a study
would allow us to say something about the importance of activity-related and general mood-
related focussing effects or attentional types (Dolan, 2010).
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The findings are also consistent with the notion that the relationship between income and
happiness is in part due to income's role as a "buffer", attenuating the impact of negative events.
Smith et al (2005), for instance, report that declines in happiness following disability were
smaller among wealthier individuals and argue that "money may not buy happiness, but it does
seem to buy people out of some of the misery associated with a decline in health status" (p.665).
Similarly here, income per se does not seem to directly affect experienced utility, but wealthier
people are less likely to have IFTs which are associated with more time spent in negative moods.
To paraphrase Smith et al (2005), money may not buy experienced utility, but it does seem to
buy people out of some of the misery associated with financial concerns. From our research, we
would like to change this by arguing that money may buy people out of financial worries, but if
people with high incomes have financial worries, then this impact is larger than the worries of
people who do not have money.
Our results do not challenge the focusing illusion as a general mechanism for explaining much of
the observed relationship between various demographic variables and measures of life
satisfaction. A substantial body of evidence has been gathered to suggest that life satisfaction
ratings are influenced by what is salient at the time of responding and intuitive beliefs about what
is "probably important" (Schwarz, 2007). Moreover, our own study may have introduced
focussing effects of its own. We are simply cautioning against concluding that income does not
show up in experienced utility when existing measures of experienced utility like the DRM focus
attention on activities and ignore the intrusive thoughts that affect us. Moreover, whilst fixed
effects rules out any omitted variables and individual heterogeneity in response, but we cannot
rule out for certain that people who are not “happy” go onto to have negative IFTs.
Importantly, such thoughts may also predict certain behaviours and so economists less interested
in happiness and more interested in behaviour might also give due consideration to intrusive
thoughts. People with chronically high levels of such thoughts, such as veterans and emergency
crew members with Post Traumatic Stress Disorder are, for instance, less likely to be engaged in
the labour market and tend to earn less if they are (e.g. Savoca & Rosenheck, 2000). Research is
now needed to explore the impact of more everyday intrusive thoughts on economically
important behaviours. For instance, our panel straddled the financial crisis, and we found that
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day satisfaction and DRM Affect were lower in 2008 as opposed to 2007 and, to lend some face
validity to our findings, that negative IFTs were higher for those at either end of the income
distribution in 2008 as opposed to 2007.
In any event, an individual's day is not simply made up of the activities they engage in but also
the thoughts that distract them. In considering the relationship between income and happiness –
and indeed between any set of determinants and happiness - future research should account for
the important role of intrusive thoughts in these associations. These thoughts can have a
powerful influence on people's moods and the present research suggests that income can affect
utility if we consider "intrusive financial thoughts" alongside "activity-focussed feelings".
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35, 345-411.
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Table 1: Summary statistics of the sample at t1 and t2 – this will include age, gender, income, IFTs (both positive and negative), SWB. 2007 2008 No children 57% 54% Cohabiting 30% 26% Married 40% 40% Divorced 1% 1% Separated 7% 7% Widowed 3% 4% Household income €42,392 €44,430 Negative intrusive financial thoughts 11% 10% Positive intrusive financial thoughts 3% 4% Life satisfaction 7.0 7.3 Day satisfaction 7.9 7.7 DRM Affect 0.52 0.45* DRM U-index 0.09 0.10
17
Bar graph 1a: IFTs (positive (red) and negative (blue)) by income in 2007
Bar graph 1b: IFTs (positive (red) and negative (blue)) by income in 2008
18
Bar graph 2A: SWB by income in 2007 (a) Life satisfaction (b) Day satisfaction (c) DRM Affect (d) DRM U-index
19
Bar graph 2B: SWB by income in 2008 (a) Life satisfaction (b) Day satisfaction (c) DRM Affect (d) DRM U-index
20
Table 2: SWB = f(Y) (1) (2) (3) (4) Pooled Pooled Pooled Pooled Life satisfaction Day satisfaction DRM Affect DRM U-index Log (HH income) 0.042* 0.061* 0.027 0.046* [0.017] [0.145] [0.020] [0.020] (5) (6) (7) (8) Random effects Random effects Random effects Random effects Life satisfaction Day satisfaction DRM Affect DRM U-index Log (HH income) 0.031 0.060* 0.023 0.032 [0.019] [0.160] [0.021] [0.022] Notes: each coefficient represents a separate regression. * represents significance at the five per cent respectively.
21
Table 3a: SWB = f(IFTS): Pooled regressions (1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.174* -0.172 -0.039 -0.013 [0.044] [0.373] [0.050] [0.052] Positive IFTs 0.053 -0.633 -0.108 -0.004 [0.078] [0.680] [0.086] [0.090]
* represents significance at the five per cent respectively. Table 3b: SWB = f(IFTS): Random effects regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.148* 0.009 -0.026 -0.031 [0.039] [0.035] [0.045] [0.047] Positive IFTs 0.083 -0.049 -0.110 -0.002 [0.073] [0.068] [0.082] [0.086]
* represents significance at the five per cent respectively. Table 3c: SWB = f(IFTS): Fixed effects regression
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.116** 0.042 -0.005 -0.059 [0.046] [0.044] [0.054] [0.056] Positive IFTs 0.124 0.039 -0.113 -0.004 [0.090] [0.111] [0.104] [0.090]
* represents significance at the five per cent respectively.
22
Table 4a: SWB = f(IFTS, income): Pooled regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.168* 0.003 -0.038 0.026 [0.044] [0.037] [0.050] [0.052] Positive IFTs 0.066 -0.036 -0.105 0.021 [0.078] [0.067] [0.087] [0.091] Log(HHincome) 0.035* 0.043* 0.061* 0.061* 0.026 0.026 0.047* 0.046* [0.017] [0.017] [0.015] [0.015] [0.020] [0.020] [0.020] [0.020]
* represents significance at the five per cent respectively. Table 4b: SWB = f(IFTS, income): Random effects regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.143* 0.024 -0.026 0.035 [0.039] [0.033] [0.046] [0.048] Positive IFTs 0.082 -0.031 -0.118 0.014 [0.073] [0.067] [0.084] [0.087] Log(HHincome) 0.025 0.033 0.061* 0.060* 0.021 0.021 0.034 0.033 [0.019] [0.019] [0.016] [0.016] [0.021] [0.021] [0.022] [0.022]
* represents significance at the five per cent respectively. Table 4c: SWB = f(IFTS, income): Fixed effects regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.118* 0.048 -0.006 0.053 [0.045] [0.041] [0.055] [0.057] Positive IFTs 0.145 0.021 -0.138 -0.001 [0.094] [0.107] [0.113] [0.118] Log(HHincome) -0.020 -0.014 0.049 0.045 -0.011 0.010 -0.071 -0.073 [0.036] [0.036] [0.033] [0.033] [0.045] [0.044] [0.046] [0.046]
* represents significance at the five per cent respectively.
23
Table 5a: SWB = f(IFTS, income, IFTS x income): Pooled regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -1.575* 0.973* 0.404 -0.019 [0.537] [0.438] [0.620] [0.643] Positive IFTs -0.841 -0.572 -0.214 1.590 [0.040] [0.786] [1.091] [1.129] Log(HHincome) 0.019 0.040* 0.074* 0.059* 0.031 0.025 0.046* 0.051* [0.018] [0.018] [0.016] [0.019] [0.021] [0.020] [0.022] [0.021) IFT*Log(HHIncome) 0.138* 0.090 -0.096* 0.054 -0.043 0.011 0.004 -0.156 [0.052] [0.096] [0.043] [0.784] [0.061] [0.108] [0.063] [0.112]
* represents significance at the five per cent respectively. Table 5b: SWB = f(IFTS, income, IFTS x income): Random effects regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.965* 1.236* 0.609 0.218 [0.483] [0.387] [0.571] [0.597] Positive IFTs -0.336 -1.170 0.022 1.972 [0.926] [0.794] [1.057] [1.098] Log(HHincome) 0.018 0.031 0.074* 0.055* 0.029 0.021 0.035 0.039* [0.019] [0.019] [0.017] [0.016] [0.022] [0.021] [0.023] [0.022) IFT*Log(HHIncome) 0.080 0.042 -0.119* 0.115 -0.062 -0.014 -0.018 -0.195 [0.047] [0.092] [0.038] [0.080] [0.056] [0.105] [0.058] [0.109]
* represents significance at the five per cent respectively. Table 5c: SWB = f(IFTS, income, IFTS x income): Fixed effects regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.080 -3.202* 1.052 0.884 [0.563] [1.430] [0.684] [0.710] Positive IFTs 0.932 -1.170 0.842 3.133* [1.235] [0.794] [1.485] [1.529] Log(HHincome) -0.020 -0.010 0.028 0.055* -0.006 -0.006 -0.067 -0.061 [0.036] [0.037] [0.033] [0.016] [0.045] [0.045] [0.046] [0.046) IFT*Log(HHIncome) -0.004 -0.079 0.336* 0.115 -0.103 -0.010 -0.081 -0.315* [0.055] [0.124] [0.149] [0.080] [0.067] [0.149] [0.069] [0.153]
* represents significance at the five per cent respectively.
24
Table 6a: SWB = f(IFTS, income, IFTS*income, other background variables, other intrusive thoughts): Pooled regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -1.428* 1.117* 0.589 0.172 [0.539] [0.446] [0.622] [0.659] Positive IFTs -0.806 -0.239 0.213 1.471 [0.968] [0.807] [1.100] [1.145] Log(HHincome) -0.003 0.007 0.056* 0.049* 0.007 -0.002 0.037 0.032 [0.020] [0.020] [0.017] [0.017] [0.023] [0.022] [0.024] [0.023] IFT*Log(HHIncome) 0.123* 0.087 -0.107* 0.018 -0.056 -0.033 -0.011 -0.145 [0.053] [0.096] [0.044] [0.081] [0.061] [0.109] [0.064] [0.113]
* represents significance at the five per cent respectively. Table 6b: SWB = f(IFTS, income, IFTS*income, other background variables, other intrusive thoughts): Random effects regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.907 1.393* 0.826 0.994 [0.497] [0.401] [0.582] [0.758] Positive IFTs -0.497 -0.783 0.261 0.425 [0.929] [0.821] [1.071] [0.612] Log(HHincome) -0.004 0.004 0.066* 0.049* 0.010 -0.002 -0.062 0.027 [0.021] [0.021] [0.018] [0.018] [0.024] [0.023] [0.048] [0.025] IFT*Log(HHIncome) 0.074 0.058 -0.133* 0.748 -0.079 -0.039 -0.090 -0.035 [0.048] [0.127] [0.039] [0.083] [0.057] [0.106] [0.074] [0.060]
* represents significance at the five per cent respectively. Table 6c: SWB = f(IFTS, income, IFTS*income, other background vars, other intrusive thoughts): Fixed effects regressions
(1) (2) (3) (4) (5) (6) (7) (8) Life satisfaction Life
satisfaction Day
satisfaction Day
satisfaction DRM Affect DRM Affect DRM U-index
DRM U-index
Negative IFTs -0.042 1.847* 1.251 0.994 [0.595] [0.503] [0.719] [0.758] Positive IFTs 0.811 -3.016 0.517 3.016 [1.272] [1.608] [1.525] [1.599] Log(HHincome) -0.032 -0.026 0.051 0.024 0.013 0.009 -0.062 0.063 [0.038] [0.038] [0.034] [0.036] [0.046] [0.046] [0.048] [0.048] IFT*Log(HHIncome) -0.010 -0.070 -0.178* 0.318 -0.121 -0.066 -0.090 -0.303 [0.058] [0.127] [0.050] [0.167] [0.070] [0.153] [0.074] [0.160]
* represents significance at the five per cent respectively.