1. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 1 www.statistik.at Register Based Census “The Austrian Principles of Redundancy” UNECE/Eurostat Meeting on Population and Housing Censuses 13 – 15 May 2008 Manuela Lenk Directorate Population © STATISTICS AUSTRIA I n f o r m a t i o n We move

2. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 2 Census test Oct 31th 2006  Full register based census  With financial consequences: distribution of revenues and expenses between the state, the federal states and the communities on the basis of the number of main residences  Without consequences for elections (number of seats in parliament for regions)  With a sample survey to check the results (surface area sample with 25.000 persons = 3‰) with obligation for the population concerned to answer the questions

3. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 3 Matching of register data  Special data protected key  By „branch-specific personal identification number official statistics“ (bPK AS)  Produced by the data protection office due to name, date of birth, birth place via ZMR (central population register)  Registrar has to order this PIN in an encrypted (ciphered) form for his data, which he has to transmit to Statistics Austria  Statistics Austria decrypts (deciphers) these PIN and uses this PIN as a common matching variable

4. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 4 Principles of register based censuses  Improvement in registers for quality reasons and for additional variables  Redundancy: same variables in many registers, Base Registers and Comparison Registers  for some variables Base Registers are also used for comparisons  Interview of Population in individual cases, to avoid heavy data defects (identification for this persons via data protection office)  residence analysis

5. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 5 Base Registers 43 Data owner for the Census Test Statistics Austria's registers:  Business register of enterprises and their local units (BR)  Housing register of buildings and dwellings (HR)  Register of educational attainment (EAR)  Register of enrolled pupils & students (PSR) Other registers:  Central population register (CPR)  Central social security register (CSSR)  Tax register (TR)  Unemployment register (UR)

6. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 6 The register model for census Persons bPIN Addr.code Populat.Census Building and dwellings Addr.code Housing C. Local Units of Empoloyment Addr.code, HV-ID Census of LUC B&D Reg.. Soc.Sec.R. Pop.Reg. Educ.R. Unempl.R. Busin.R. Tax Reg.

7. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 7 Comparison Registers  Child allowance register (CAR)  Central foreigner register (CFR) - available as of 2008  Registers of public servants of the federal state and the “Länder” (RSP)  Register of car owners (COR)  Register of social welfare recipients (SWR)  Conscription Register (CR)  Register of alternative civilian service (ACSR)

8. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 8 Census technology (1)  Completion of incomplete/fragmentary base data by comparison data  Check at register owner in the case of contradictory or incomplete data (without transmission of the data)  Residence Analysis: cause for suspicion of inactive persons, character and date of the last change in the register

9. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 9 Census technology (2)  Challenge of Statistical Matching in consecutive steps: combining person’s information deriving from different data sources  record linkage by bPK altern. Social Security Nb  198.000 records only in CPR  entry should be in minimum two registers (e.g. CPR + UR, CPR + CSSR)  statistical matching by address, sex, age  58.000 cases left only in CPR  residence analysis  Persons not matched  Correct persons´ information, but with entry in the CPR only (retiree with pensions paid from abroad)  Non-active register entries  deletion

10. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 10 Census technology (3)  First results (report to the government) estimated proportion of deletion  60 %  Number of main residencies for the revenue of municipalities  residence analysis, clearing up to October 2008  creating and providing ‘OLAP-Cubes’ for each unit of analysis  Multiple and central attributes (principle of redundancy)  Defining the valid value  valid for all cubes of persons  Details on a personal level only in cube demography  Quality check of the different registers  results are consistent due to the same data-basis

11. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 11 results of census test (1)  Census test was successful  Valid and high-quality results  Number of main residencies  demographic structural data  low variations between the registers and the sample survey for age, sex, nationality, place of birth  Current activity Status, employment, unemployment  no problems with forming the variables, low variations between the registers and the sample survey, mapping nearly completed, estimation for homemakers  Occupation no register information only estimation

12. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 12 results of census test (2)  Education  Mapping for 94,1% of the population above 14 years  remaining people (e.g. Immigrants) estimation  education participation  Mapping for 98,3 % pupils (7-14 years)  clearing via residence analysis  Commuting data for pupils and students  Mapping home address – school address  99,96 %  Private households  ~ 7,8% main residencies no unique mapping to dwellings  Institutional households

13. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 13 results of census test (3)  sufficient quality – some improvements scheduled for 2011  Census of local units of employment  Mapping problems for enterprises with more than one local unit  new register information for the census 2011  Housing census  0,2 % artificial objects  3,5 % artificial dwellings  Main residencies without connection to object respectively dwelling

14. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 14 results of census test (4)  Problems – improvements are necessary  Commuting data for employees  new register information for the census 2011  Forming persons to households = living in the same dwelling (lack of door number of dwellings), marital status is widely missing  family statistics  Dissemination of the census 2011  Cubes for Eurostat  no problems

15. S T A T I S T I C S A U S T R I A May 13th – 15th 2008 15 Thank you for your attention!