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Overview of Approaches to Censuses Using Registers

UNECE-UNFPA Workshop on Censuses Using Registers Geneva, 21 May 2012. Overview of Approaches to Censuses Using Registers. Paolo Valente United Nations Economic Commission for Europe Statistical Division. Content:. Fully register based census Data from registers + existing sample surveys

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Overview of Approaches to Censuses Using Registers

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  1. UNECE-UNFPA Workshop on Censuses Using Registers Geneva, 21 May 2012 Overview of Approaches to Censuses Using Registers Paolo Valente United Nations Economic Commission for Europe Statistical Division

  2. Content: • Fully register based census • Data from registers + existing sample surveys • Data from registers + ad-hoc sample surveys • Data from registers + full enumeration • Data from registers + full enum. + ad-hoc survey • Overview of methods adopted in UNECE region

  3. Content: «Combined census» • Fully register based census • Data from registers + existing sample surveys • Data from registers + ad-hoc sample surveys • Data from registers + full enumeration • Data from registers + full enum. + ad-hoc survey • Overview of methods adopted in UNECE region

  4. 1. Fully register based censuses • Census conducted by integrating data from various registers • Conclusion of long step-by-step process • Census is part of a system of register-based information • Main requirements: • Availability of population register and dwelling register • Capacity to link persons and dwellings, identifying households • Public and legislative support for the use of population registers

  5. 1. Fully register based censuses Advantages: • No burden on individuals • Data usually available every year • Once high quality registers are established, it is cheaper than a full field enumeration Limitations: • Setting up and maintenance require significant resources • Characteristics to be collected are limited to those on the registers • Quality of census depends on coverage and quality of registers • Data in registersusuallycollected for non-statisticalpurposes • Statistical agencies are also dependent on register authorities 2000 round (3 countries): Andorra, Denmark, Finland 2010 round (8): + Austria, Belgium, Norway, Slovenia, Sweden

  6. 2. Data from registers + existing sample surveys • When some variables are not available in registers, data from existing sample surveys (i.e. LFS) can be used • Data linked at individual level • No field data collection

  7. 2. Data from registers + existing sample surveys Advantages: • No burden on respondents • Reduced costs: no specific field data collection • Consistency between census results and survey results Disadvantages: • Process to successfully link information on individuals from different surveys and registers is complex • Limited detail for information taken from sample surveys 2000 round: Netherlands (« Virtual census ») 2010 round: Netherlands, Iceland

  8. 3. Data from registers + ad-hoc sample surveys • Alternative: conduct ad-hoc sample surveys instead of using data from existing surveys • Ad-hoc sample surveys can be used to collect data on selected variables and/or evaluate accuracy of registers • Requires capacity to link individual data from different sources

  9. 3. Data from registers + ad-hoc sample surveys Advantages: • Accuracy of population register can be tested • Population counts could be adjusted • Limited burden on respondents (sample survey) • Limited costs (sample survey) Disadvantages: • Method could be complex • Limited detail for information taken from sample surveys 2010 round: Israel, Spain, Switzerland, Turkey

  10. 4. Data from registers + full enumeration • When data for some variables are missing in registers, and detailed data are required (sample not sufficient) • Data on most variables are taken from registers, but all units are asked for data on limited number of variables • Enumeration may also allow evaluation of coverage and accuracy of register data • Some register data can be pre-printed in questionnaires

  11. 4. Data from registers + full enumeration Advantages: • Data collection canbeused to set-up, update or improveregisters in view of future fullyregister-basedcensus !!!  Distinction betweenstatisticaloperation (census) and admin. operation (register update) shouldbeclear to the respondents • More efficient than traditional census in field operations thanks to use of registers data Disadvantages: • Very expensive (full field enumeration) • Burden on the public (full field enumeration) • Method can be complex to apply 2010 round: 6 countries

  12. 5. Data from registers + full enumeration + ad-hoc sample survey • Full enumeration for important variables or to update and improveregisters • Samplesurveys for variables which do not require high information detail 2010 round: Germany, Poland+ Italy (long/short form)

  13. Census methods adopted in UNECE Regionin 2000 and 2010 round

  14. Sources on Register based censuses Fully register-based censuses also covered in UNECE publication on register-based statistics: http://www.unece.org/stats/census/

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