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Research on the quality of registers to make data decisions in the Dutch Virtual Census Presentation at the 58th World Statistics Congress of the International Statistical Institute in Dublin 23 August 2011 Eric Schulte Nordholt ([email protected] ), Saskia Ossen ([email protected] ) and Piet Daas ([email protected] )

Research on the quality of registers to make data ... · Research on the quality of registers to make data decisions in the Dutch Virtual Census. 7. Results Metadata hyperdimension

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Page 1: Research on the quality of registers to make data ... · Research on the quality of registers to make data decisions in the Dutch Virtual Census. 7. Results Metadata hyperdimension

Research on the quality of registers to make data decisions in the Dutch Virtual Census

Presentation at the 58th World Statistics Congress of the International Statistical Institute in Dublin

23 August 2011

Eric Schulte Nordholt ([email protected]), Saskia Ossen ([email protected]) and Piet Daas ([email protected])

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Research on the quality of registers to make data decisions in the Dutch Virtual Census 1

Combining research

Development of a quality framework for administrative data

Data decisions on secundary sources in the Dutch Virtual Census of 2011

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Research on the quality of registers to make data decisions in the Dutch Virtual Census 2

Contents

• Data considerations in the Dutch Census of 2011

• Introduction to the quality framework

• Results Source hyper dimension

• Results Metadata hyper dimension

• Results Data hyper dimension

• Conclusions

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Research on the quality of registers to make data decisions in the Dutch Virtual Census 3

Data considerations in the Dutch Census of 2011 (1)Last traditional census: 1971

Unwillingness (nonresponse) and reduction ofexpenses no more traditional censuses

Alternative: virtual census1981 and 1991: Population Register and surveysDevelopment 90’s: more registers →2001 and 2011:integrated set of registers and surveysEuropean Census Act → hypercubes

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Data considerations in the Dutch Census of 2011 (2)Registers:• Population Register (PR), >16.6 million records• Jobs file, containing all employees • Self-employed file, containing all self-employed• Unemployment Benefit Register (UR)• Social Security Register (SR)• Education Register (ER)• New Housing Register (HR)

Surveys:• Survey on Employment and Earnings (SEE) stopped• Labour Force Survey (LFS)• Housing survey

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Research on the quality of registers to make data decisions in the Dutch Virtual Census 5

Introduction to the quality framewok

SOURCE: - Focus on data source as a whole- Contact information related- Delivery related aspects- and more

METADATA:Focuses on the (availability of the) information required to understand and use the data in the data source

DATA: - Technical checks- Accuracy related

issues

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Low frequency of delivery

Suffers seriously from selective undercoverage

Purpose dataprovider unclear

Important variables are missing

Results Source hyper dimension

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Results Metadata hyperdimension

Time period in source can’t be transferred easily to the time point needed

Unique keys can’t be easily used for linking

Time differences in reporting periods

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Results Data hyper dimension -completeness

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Results Data hyper dimension –accuracy

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Research on the quality of registers to make data decisions in the Dutch Virtual Census 10

Results Data hyper dimension – accuracy

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Conclusions• The virtual census has proved to be a successful concept in the Netherlands

• The quality framework is a useful tool for making data decisions in the virtual census

• The “quality study” started in this paper will be extended to be able to determine how all census variables will be derived

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Time for questions and discussion