The Social Statistics Database:

Invaluable source of micro-data for socio-economic statistics

Johan van Rooijen

Contents of this pesentation

• What does the Social Statistics Database (SSD) contain?

• Linkage keys• Standardization• Data and metadata• Process• Privacy-protection• Output-examples

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SSD: contents

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• Persons• Relations between persons• Households• Jobs• Self-eployment• Social security benefits• State and employer pensions

• Income• Education• Hospitalizations• Causes of death• Criminal offense reports• Houses• Vehicles

The SSD is a central database containing microdata on:

and more……

Many administrative sources, such as:

•Population Register •Register Income Tax Declarations•Administration of Employee Insurance Schemes •Police Register•Valuation of real estate registration system

Survey:

•Labour Force Survey

Future developments: more administrative sources, more surveys, big data?

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SSD: linkage keys

All mirco datafiles stored in the SSD contain a LINKAGE KEY:

Interlinking microdata is what the SSD is about!

Example:

linking microdata on graduates with data on persons and data

on employment in order to describe the transisiton from

education to labour market participation

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PIN: person identification numberHIN: household identification numberAIN: adress identification numberEIN: enterprise identification number

SSD: contents and linkage keys

SSD: standardization

standardization is an important aspect of the SSD

•organization of the IT-infrastructure•file formats•linkage keys•names•metadata

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SSD: relation between data and meta-data

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In conclusion:

Microdata-files are linked to other microdata-files by means of a set of standardized linkage keys

Microdata-files are linked to their metadata through the name (file-name / variable-names)

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SSD: process

SSD: privacy-protection

Legislation: •Statistics Netherlands Act •Netherlands Data Protection Act

These laws:•authorize Statistics Netherlands to use personal data•oblige Statistics Netherlands to take adequate measures aimed at privacy protection

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Privacy protection measures:

•Linkage keys are anonymous, original personal identifiers are removed from the data •Access rights to the SSD are restricted•Limited e-mail facilities•Staff members have to take an oath•Check on disclosure risk of output

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SSD: Examples of output

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Transition from education to labour market participation

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The effect of discharge and discharge reason on relationship dissolution

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0,0% 5,0% 10,0% 15,0% 20,0% 25,0% 30,0% 35,0% 40,0%

no discharge (control group)

discharge (redundancy)

discharge (personal grounds)

discharge (longterm illness)

womenmen

Dropping out of school and criminal behavior

  Suspected of a crime in the period 1999-2006

overall 8.2 %

drop-outs 37.6 %

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Research by external researchers (through Centre for Policy-related Statistics)

• The Netherlands Cancer Institute: linking SSD-data to cancer registration

• Municipalities: evaluation of their social assistance policy by enriching own data with data from the SSD

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The end

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