Manuela Lenk Statistics Austria Registers Classifications and Methods

Manuela Lenk Statistics Austria Registers, Classifications and Methods Division 6 th – 8 th June 2012 www. statistik. at Challenges in the transition from traditional to registerbased census in Austria Conference of European Statisticians 60 th Plenary Session, Paris We provide information

Evolution of the Austrian census 2001 Last traditional census High burden for respondents, considerable financial effort (72 million Euros) Register-based Census 2011 -- The Movie - You. Tube 2006 Register-based test census Methods, data procedures and use of registers were successfully tested 2009 Start of annual register-based labor market statistics Possibility for application and improvement of methods 2011 First complete register-based census No burden for respondents, costs reduced to 10 million Euros – Data from 7 base and 7 comparison registers (35 data holders) www. statistik. at slide 2 | 6 June 2012

Register Based Census – Base Registers www. statistik. at slide 3 | 6 June 2012

Data Privacy Protection – Unique keys www. statistik. at slide 4 | 6 June 2012

Data Privacy Protection – Target swapping Target-swapping Ø Detect risky records that could be identified because of their specific combination of attributes Ø Exchange single attributes of those records with the characteristics of another individual. onal i t a c u Ed nt e m n i a att www. statistik. at Educati on attainm al ent slide 5 | 6 June 2012

The principle of redundancy Ø Ø Same attribute in more than one register Comparison registers are used to confirm the values in the base registers due to quality improvement b. PIN OS SEX_CPR SEX_CSSR SEX_TR SEX_UR SEX_VALID RULE … … … 1 1 1 0 1 1 ID 3458 1 0 0 0 1 2 ID 3459 0 2 2 3 ID 3460 2 2 1 1 2 4 … … … … ID 3457 CPR=Central Population Register, CSSR=Central Social Security Register, TR=Tax Register, UR=Unemployment Register www. statistik. at slide 6 | 6 June 2012

Residence Analysis Persons who are only recorded in the CPR receive a letter containing the question: “Did you have your main residence in Austria at the reference date? – Yes or No? ” b. PIN OS CPR CSSR TR UR SWR CAR … … … … … … ID 3458 ID 3459 ID 3460 … … … ID 3457 CPR=Central Population Register, CSSR=Central Social Security Register, TR=Tax Register, UR=Unemployment Register, SWR=Register of Social Welfare Recipients, CAR=Child Allowance Register www. statistik. at slide 7 | 6 June 2012

From Raw Data to the Final Data Pool Raw data Ø The single registers provided by the data holders Ø Every register authority delivers the b. PINs Census Database Ø The combined information from the registers Ø The key for data merging is the b. PIN_OS Final Data Pool Ø The final data after imputations by the NSI RAW www. statistik. at CDB FDP slide 8 | 6 June 2012

Quality framework www. statistik. at slide 9 | 6 June 2012

Quality assessment Ø Independence of the quality framework The framework is closely tied to the data flow, but independent from the processing to evaluate the process without influencing it. Ø Calculation of quality indicators Quality indicators are derived for each attribute in each register. Further these measures are calculated for the raw data level, CDB and FDP. Ø Hyperdimensions The hyperdimensions cover a) the quality of data generation and documentation b) the detection of formal errors, missing primary keys and non- response c) a comparison of census data with an external source www. statistik. at slide 10 | 6 June 2012

Potentials and perspectives Ø Quality indicators on register level - each attribute in each register is associated with a quality indicator - indicators can also be used for other projects and deliver essential information about the quality Ø Quality indicators for the Final Data Pool of register-based statistics - indicator for each attribute which covers all quality-related aspects quality of the register quality of imputations - The experience gained with the new census type can be of use for other population and household surveys - The quality framework can be used for other register-based statistics www. statistik. at slide 11 | 6 June 2012

Further Information Ø Austrian Journal of Statistics, Volume 39 (2010), Number 4 • Ø Statistica Neerlandica, Volume 66 (2012), Issue 1 • Ø http: //live. unece. org/fileadmin/DAM/stats/documents/ece/ces/ge. 41/2010/wp. 4. e. pdf European Conference on Quality in Official Statistics 2010, Helsinki • Ø http: //www. cros-portal. eu/sites/default/files/S 13 P 1. pdf UNECE/Eurostat Expert Group Meeting on Register-Based Censuses 2010, The Hague • Ø http: //isi 2011. congressplanner. eu/pdfs/650199. pdf NTTS Conference 2011, Brussels • Ø http: //www. ine. es/e/essnetdi_ws 2011/ppts/Lenk. pdf ISI World Statistics Congress STS 50 - Methods and quality of administrative data used in a census 2011, Dublin • Ø http: //onlinelibrary. wiley. com/doi/10. 1111/j. 1467 -9574. 2011. 00506. x/pdf ESSnet on Data Integration 2011, Madrid • Ø http: //www. stat. tugraz. at/AJS/ausg 104/104 Berka. pdf http: //q 2010. stat. fi/media//presentations/session-26/fiedler_quality-in-official-statistics_statisticsaustria_paper. pdf European Conference on Quality in Official Statistics, June 2012 (forthcoming) www. statistik. at slide 12 | 6 June 2012

Please address queries to: Manuela Lenk Register based census Contact information: Guglgasse 13, 1110 Vienna phone: +43 (1) 71128 -8283 fax: +43 (1) 71128 -7445 manuela. lenk@statistik. gv. at www. statistik. at Challenges in the transition from traditional to registerbased census in Austria Conference of European Statisticians 60 th Plenary Session, Paris slide 13 | 6 June 2012