Combining information from statistical populations: Challenges and solutions

1. Combining information from statistical populations: Challenges and solutions Use of Administrative Registers in Production of Statistics Group work Oslo, 14 - 17 October 2014 Coen Hendriks Division for Statistical Populations Statistics Norway

2. Exercise: Produce statistics on dwelling households from registers in your countries • Round table: a short presentation of the present register situation in your countries (concentrate on registers which are relevant for household statistics). Choose one/two countries as cases for the next questions. • What kind of administrative information do you need to produce statistics on dwelling households from registers? Some keywords: Sources, ID-numbers, linkage keys, quality issues, legal issues • What kind of administrative information is available presently in your countries? • Make suggestions how to resolve quality problems in your countries. • Short term solutions • Long term solutions • Prepare some bullet points for the discussion/plenary session.

3. Dwelling household concept A Dwelling Household Person Dwelling

4. Groups

6. Norwegian 2001 Census Goals • Produce Census statistics for 2001 • Establish a basis for the 2011 register-based census • The Dwelling Address Project • The dwelling household concept

7. The Dwelling Address Project • Major goals • Extend the GAB-register to comprise dwellings, not only buildings • Add dwelling number to street address • Main Street 8A, H0103 • Establish a link between dwellings and resident persons (in CPR) • Using data from census forms • Main problem: Multi-dwelling buildings • Participants • Statistics Norway (Census 2001) • Tax Inspectorate (CPR) • Norwegian Mapping Authorities (GAB) • Municipalities (local authorities) • Use “census data” for administrative purposes • Multiple legal base for Census 2001 • Statistics Act, CPR, GAB

8. Multi-dwelling buildings before Census 2001 ? H0102 H0103 H0101 H0104 Main street 8 A

9. Multi-dwelling buildings after Census 2001, planned H0102 H0103 H0101 H0104 Main street 8 A H0101 BUT-----------

10. Multi-dwelling buildings after Census 2001, result H0102 H0103 H0101 H0104 Main street 8 A Main street 8 A H0101 55 % of persons in multi-dwelling houses linked to a unique dwelling address. Following up necessary!

11. Dwelling household concept A Dwelling Household Person Dwelling

12. Experiences from the first fully register based Norwegian census in 2011 • Starting point: • Household statistics from register: 2 225 000 private households • Dwelling statistics from register: 2 416 000 dwellings • Direct match: 1 900 000 «dwelling households» • 85 % of all households • 79 % of all dwellings • Experiences: • Persons in one household were linked to different dwellings • Persons from different households were linked to the same dwelling • Each dwelling that does not link to a person/household constitutes an unoccupied dwelling

13. Unit errors • In the household file: • Relevance or definition error – dwelling vs. living household • Coverage error – private/institutional houshold, unregistered migration • Unit error – delay in updating • In the dwelling file: • Coverage error – under and over-coverage • Measurement error – underreporting • Initial lack of integrability – missing address information

14. Solution: improved micro integration. Starting with 1 670 845 addresses Many dwellings without match Many households without match • Double nearestneighbourimputation to ensure a completeintegratedstatisticaldataset • Maintainthe margins from the household file and thedwelling file • At the proper geographicallevel • Refer to Zhang, L.C. and C. Hendriks: Micro interationof register-based census data for • dwelling and household. UNECE - WorkSessionon Statistical Data Editing • 24-26 September 2012