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www.statistik.at We provide information Challenges in the transition from traditional to register- based census in Austria High-level Seminar on Population Censuses and Migration Statistics Manuela Lenk Statistics Austria Head of unit register-based Census 16 th – 18 th October 2013
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www.statistik.atslide 2 | October 2013 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 - YouTube Register-based Census 2011 -- The Movie - YouTube 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)
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www.statistik.atslide 3 | October 2013 Register Based Census – Base Registers
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www.statistik.atslide 4 | October 2013 Data Privacy Protection – Unique keys
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www.statistik.atslide 5 | October 2013 Data Privacy Protection – Target swapping Educational attainment Target-swapping Detect risky records that could be identified because of their specific combination of attributes Exchange single attributes of those records with the characteristics of another individual.
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www.statistik.atslide 6 | October 2013 The principle of redundancy Same attribute in more than one register Comparison registers are used to confirm the values in the base registers due to quality improvement bPIN OSSEX_CPRSEX_CSSRSEX_TRSEX_URSEX_VALIDRULE …………… …… ID3457111011 ID3458100012 ID3459020223 ID3460221124 …………… …… CPR=Central Population Register, CSSR=Central Social Security Register, TR=Tax Register, UR=Unemployment Register
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www.statistik.atslide 7 | October 2013 Residence Analysis bPIN OSCPRCSSRTRURSWRCAR ………………… ID3457 ID3458 ID3459 ID3460 ………………… 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 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?”
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www.statistik.atslide 8 | October 2013 From Raw Data to the Final Data Pool Raw data The single registers provided by the data holders Every register authority delivers the bPINs Census Database The combined information from the registers The key for data merging is the bPIN_OS Final Data Pool The final data after imputations by the NSI
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www.statistik.atslide 9 | October 2013 Quality Framework
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www.statistik.atslide 10 | October 2013 Quality assessment 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. 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. 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
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www.statistik.atslide 11 | October 2013 Potentials and perspectives 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 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
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www.statistik.atslide 12 | October 2013 Further Information Austrian Journal of Statistics, Volume 39 (2010), Number 4 http://www.stat.tugraz.at/AJS/ausg104/104Berka.pdf Statistica Neerlandica, Volume 66 (2012), Issue 1 http://onlinelibrary.wiley.com/doi/10.1111/j.1467-9574.2011.00506.x/pdf Journal of Official Statistics, Ćetković et al. (forthcoming) ESSnet on Data Integration 2011, Madrid http://www.ine.es/e/essnetdi_ws2011/ppts/Lenk.pdf ISI World Statistics Congress STS50 - Methods and quality of administrative data used in a census 2011, Dublin http://isi2011.congressplanner.eu/pdfs/650199.pdf NTTS Conference 2013, Brussels http://www.cros-portal.eu/sites/default/files/NTTS2013fullPaper_84.pdf UNECE 2013 - Selected national experiences in the 2010 census round, Geneva http://www.unece.org/fileadmin/DAM/stats/documents/ece/ces/ge.41/2013/census_meeting/28_E_Rev.1.pdf European Conference on Quality in Official Statistics 2010, Helsinki http://q2010.stat.fi/media//presentations/session-26/fiedler_quality-in-official-statistics_statisticsaustria_paper.pdf
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www.statistik.at slide 13 | 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 Challenges in the transition from traditional to register- based census in Austria High-level Seminar on Population Censuses and Migration Statistics
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