Data project

Income panel study

Inkomens Panelonderzoek (IPO)

Summary

Strengths: High quality data collected on a large sample. Weaknesses: Some income components are not registered.

Type of data

Data Source
Registry

Type of Study
Other: Panel study, mainly based on registrations, complemented by estimations.

Data gathering method
Registries

Access to data

Conditions of access
Cannot be downloaded directly.

Type of available data (e.g. anonymised microdata, aggregated tables, etc.)
Anonymised microdata

Formats available
SPSS (default)

Coverage

Coverage Years of collection, reference years, and sample sizes
Data was collected between 1989 and 2011 (also some earlier years available). The total sample size used was of of 250,000 individuals and 88,000 households. Data collection is ongoing and is scheduled to continue at some point in the future.

First year of collection
1989

Stratification if applicable
Post-stratification: weighting by following variables: age, sex, region, household size, age of the main provider.

Base used for sampling

Geographical coverage and breakdowns
Dutch population in non-institutional households on the 31rd of December.

Age range
No age restrictions

Statistical representativeness
Population representative

Coverage of main and cross-cutting topics
Detailed study of: Household and personal income levels and specifications, changes in purchasing power.

Linkage

Standardisation

Possibility of linkage among databases
Linkable to other person databases through anonymised personal number.

Data quality

Entry errors if applicable
Sampling errors (small, due to large sample size), administrative non-response (< 1 per cent).

Breaks
Break in 2000 due to changes in tax regulations.

Consistency of terminology or coding used during collection
Definitions are consistent for the 1989-2000 and for the 2000-2011 periods.

Governance

Contact information
Department of Labour, Income and Living conditions
Statistics Netherlands
Henri Faasdreef 312
2492 JP Den Haag Netherlands Phone: Infoservice: 003188 570 70 70
Email: info(at)cbs.nl
Url:

Timeliness, transparency
Data is collected annually. Preliminary data is released 8 months after collection. Final database is published 20 months after collection.