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Dutch Virtual Census Presentation at the International Seminar on Population and Housing Censuses; Beyond the 2010 Round 27-29 November, 2012 Egon Gerards,

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Presentation on theme: "Dutch Virtual Census Presentation at the International Seminar on Population and Housing Censuses; Beyond the 2010 Round 27-29 November, 2012 Egon Gerards,"— Presentation transcript:

1 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

2 test 1 Introducing Dutch Virtual Census Short movie: Census Data http://youtu.be/SLpDkcyenf0http://youtu.be/SLpDkcyenf0 Dutch Virtual Census – Egon Gerards

3 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 2

4 test 3 Overview  The Dutch (Virtual) Census  Census based on the Social Statistical Database  Used methods  Advantages/disadvantages of a virtual census Dutch Virtual Census – Egon Gerards

5 test 4 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 Dutch Virtual Census – Egon Gerards

6 test 5 History 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 Dutch Virtual Census – Egon Gerards

7 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) test 6 What is the Social Statistical Database? Dutch Virtual Census – Egon Gerards

8  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) test 7 Facilitating use of administrative sources Dutch Virtual Census – Egon Gerards

9 Census 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 test 8 registers survey Dutch Virtual Census – Egon Gerards

10  Micro linkage  Micro integration  Weighting technique test 9 Combining sources; from data to tables Dutch Virtual Census – Egon Gerards

11  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 test 10 Micro linkage Dutch Virtual Census – Egon Gerards

12 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 life  Compare sources: coverage and conflicting information (reliability of sources)  Integration rules: checks, adjustments, imputations  Optimal use of information; quality improves test 11 Micro integration Dutch Virtual Census – Egon Gerards

13  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 test 12 Repeated weighting Dutch Virtual Census – Egon Gerards

14  Collection of administrative registers  Surveys only additional and existing  No additional data collection  Linking the sources  Micro integration  Estimation/Weighting 13 Dutch Virtual Census test Dutch Virtual Census – Egon Gerards

15  Relatively cheap (small cost per inhabitant)  Quick (short production time)  Less problems with non-response  It can be done permanently! test 14 Advantages Virtual Census Dutch Virtual Census – Egon Gerards

16  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 15 Disadvantages Virtual Census test Dutch Virtual Census – Egon Gerards

17 16 Dutch population 1829 - 2011 test Dutch Virtual Census – Egon Gerards

18  More information about the Dutch traditional Censuses (including those of 1960 and 1971) http://www.volkstellingen.nl/en/ 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 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/ 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/cvbwww.cbs.nl/cvb 17 Statistics Netherlands: microdata availability test Dutch Virtual Census – Egon Gerards

19  300 km long, 200 km wide  Quarter of the land below sea level  16,7 million people  Densily populated: 500 persons / km 2  Kingdom: Queen Beatrix Thank you for your attention! test 18 The Netherlands Dutch Virtual Census – Egon Gerards

20  Tables 2001 http://www.cbs.nl/nl- NL/menu/themas/dossiers/historische- reeksen/publicaties/volkstelling-2001/2003-volkstelling- excel.htmhttp://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.htmhttp://www.cbs.nl/nl- NL/menu/themas/dossiers/historische- reeksen/publicaties/volkstelling-2001/2001-b57-pub.htm test 19 More information Census 2001 Dutch Virtual Census – Egon Gerards

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