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I n f o r m a t i o n

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 May 13th – 15th 2008

www.statistik.at

S T A T I S T I C S A U S T R I A 1

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 May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 2

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 May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 3

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 May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 4

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) May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 5

The register model for census

Pop.Reg.

Tax Reg.

Unempl.R.

Educ.R.

Persons bPIN Addr.code

Populat.Census

Soc.Sec.R.

B&D Reg..

Building and dwellings Addr.code

Housing C.

Local Units of

Empoloyment Addr.code, HV-ID Census of LUC Busin.R.

May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 6

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) May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 7

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 May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 8

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

May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 9

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 May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 10

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 May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 11

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)  residence analysis clearing via  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 May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 12

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 May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 13

results of census test (4)

 Problems – improvements are necessary  Commuting data for employees  for the census 2011 new register information  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 May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 14

Thank you for your attention!

May 13th – 15th 2008 S T A T I S T I C S A U S T R I A 15