dutch virtual census presentation at the international seminar on population and housing censuses;...

Dutch Virtual Census

Presentation at the International Seminar on Population and Housing Censuses; Beyond the 2010 Round

27-29 November, 2012 Egon Gerards, The Netherlands

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Introducing Dutch Virtual CensusIntroducing Dutch Virtual Census

Short movie: Census Data http://youtu.be/SLpDkcyenf0

Dutch Virtual Census – Egon Gerards

Dutch Virtual Census

Presentation at the International Seminar on Population and Housing Censuses; Beyond the 2010 Round

27-29 November, 2012 Egon Gerards, The Netherlands

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OverviewOverview

The Dutch (Virtual) Census

Census based on the Social Statistical Database

Used methods

Advantages/disadvantages of a virtual census


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History of the Dutch Census History of the Dutch Census

Traditional Census Ministry of Home Affairs: 1829, 1839,

1849, 1859, 1869, 1879, and 1889 Statistics Netherlands: 1899, 1909, 1920,

1930, 1947, 1960, and 1971

Experience of 1971: Unwillingness (non-response) and reduction expenses

No more traditional censuses


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History of the Dutch CensusHistory of the Dutch Census

Alternative: virtual census

1981 and 1991: Population Register and surveys development 90’s; More and more registers used in the Census

2001 and 2011: based on an integrated set of registers and surveys: Social Statistical Database


Definition:Comprehensive set of integrated micro-datafiles with coherent and detailed demographic and socio-economic data on persons, households, dwellings, jobs, and benefits

Two versions of the SSD:“fast” SSD (fast, regular statistics)micro integrated SSD (high-quality, longitudinally consistent statistics)

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What is the Social Statistical Database?What is the Social Statistical Database?


Legal base (Statistics Act) Public approval (‘Big Brother is watching you’) Cooperation among authorities (mainly

government organisations) Comprehensive and reliable register system

(administrative versus statistical quality) Unified identification system (preferably unique

ID-numbers)

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Facilitating use of administrative sourcesFacilitating use of administrative sources


Census and SSD data sourcesCensus and SSD data sources

Population Register Jobs file, containing all employees Self-employed file, containing all self-employed Fiscal administration Social Security administrations Pensions and life insurance benefits Housing register

Labour Force Survey data around Census Day

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registers

survey


Micro linkage

Micro integration

Weighting technique

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Combining sources; from data to tablesCombining sources; from data to tables


Linkage key Registers: Citizen Service Number, unique Surveys: Sex, date of birth, address (postal code and

house number)

Linkage key replaced by RIN-person (confidentiality)

Linkage strategy Optimizing number of matches Minimizing number of mismatches and missed

matches

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Micro linkageMicro linkage


Micro integration aims at improving data quality in combined sources by searching and correcting for errors on unit level

Collecting data from several sources; more comprehensive and coherent information on aspects of a person’s lifeCompare sources: coverage and conflicting information (reliability of sources)Integration rules: checks, adjustments, imputationsOptimal use of information; quality improves

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Micro integrationMicro integration


Creating register-survey tables

Demand for overall numerical consistency one figure for one phenomenon idea all tables based on different sources (e.g. surveys)

should be mutually consistent

Repeated Weighting (RW): technique to achieve numerical consistency

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Repeated weightingRepeated weighting


Collection of administrative registers Surveys only additional and existing No additional data collection Linking the sources Micro integration Estimation/Weighting

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Dutch Virtual CensusDutch Virtual Census

testDutch Virtual Census – Egon Gerards

Relatively cheap (small cost per inhabitant) Quick (short production time) Less problems with non-response It can be done permanently!

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Advantages Virtual CensusAdvantages Virtual Census


Dependent on register holders (statistics is not their priority) Timeliness of registers Concepts and population of registers may differ from what is

needed (keep good relations with the register holders!) Publication of small subpopulations sometimes difficult or

even impossible because of limited information in already existing surveys

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Disadvantages Virtual CensusDisadvantages Virtual Census


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Dutch population 1829 - 2011Dutch population 1829 - 2011


More information about the Dutch traditional Censuses (including those of 1960 and 1971) http://www.volkstellingen.nl/en/

One percent samples for three years (1960, 1971 and 2001) IPUMS (Integrated Public Use Microdata Series) http://www.ipums.org/international/index.html

Microdata sets for all three above years available for research! DANS (Data Archiving and Networked Services) http://www.dans.knaw.nl/en/

Centre for Policy Related Statistics; research for commissioned work and remote access to microdata for research: www.cbs.nl/cvb

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Statistics Netherlands: microdata availabilityStatistics Netherlands: microdata availability


300 km long, 200 km wide Quarter of the land below sea level 16,7 million people Densily populated: 500 persons / km2

Kingdom: Queen Beatrix

Thank you for your attention!

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The NetherlandsThe Netherlands


Tables 2001 http://www.cbs.nl/nl-NL/menu/themas/dossiers/historische-reeksen/publicaties/volkstelling-2001/2003-volkstelling-excel.htm

Book and extra chapter 2001 http://www.cbs.nl/nl-NL/menu/themas/dossiers/historische-reeksen/publicaties/volkstelling-2001/2001-b57-pub.htm

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More information Census 2001More information Census 2001


dutch virtual census presentation at the international seminar on population and housing censuses;...

Documents

census daytest

virtual census1981

census data http

socioeconomic data

data quality

dutch censusalternative

unit levelcollecting

fast ssd