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EPUNet Training Course 2005 Day 1 Tutors: Olaf Jürgens and Christian Schmitt Berlin, April 11th to April 15th 2005. Overview. Questionnaires PDB vs. UDB Ex-Post vs. Ex-Ante Harmonization. Questionnaires. PDB Questionnaires (Production Data Base) PDB contains the following files:
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EPUNet Training Course 2005Day 1Tutors: Olaf Jürgens and Christian SchmittBerlin, April 11th to April 15th 2005
Overview • Questionnaires • PDB vs. UDB • Ex-Post vs. Ex-Ante Harmonization
Questionnaires PDB Questionnaires (Production Data Base) PDB contains the following files: • Personal File • Household File • Personal Register File • Household Register File This is the data that was collected in the field
Questionnaires UDB Questionnaires (User Data Base) UDB data is based on a conversion of PDB data that is similar for all countries Central tool for getting information • ECHP UDB Description of Variables (Doc-Pan 166) Codebook referring to ECHP contents and cross national differences
ECHP Participation across Europe ECHP consists of 8 waves All countries 1994 to 2001 except: • Austria (1995-2001) • Finland (1996-2001) • Luxembourg (1995-2001) • Sweden (1997-2001 cross-section only!)
From PDB to UDB ECHP Data generation – two step process • PDB vs. • UDB PDB: Collecting the data in the field by NDUs (National Data Units) Transmission of data to EUROSTAT UDB: Converting national data using a generalized algorithm into User Data Base format
Ex-Ante (Input) Harmonization Concept: Unique set of questions as basis for a cross national comparable data-set True for all countries except • Luxembourg (PSELL, 1995-2001) • Germany (SOEP) • UK (BHPS)
Ex-Ante (Input) Harmonization Concept: Unique set of questions as basis for a cross national comparable data-set Further Exceptions: • Timing of national panels • Cloning of national data sets • Differences in modes of data collection • Differences in national settings (policy settings, etc.)
Ex-Post (Output) Harmonization Data is transformed (cloned) to fit a unique concept after data collection • Luxembourg (PSELL) (wave 2, 1995) • Germany (SOEP) • UK (BHPS) Both (bold) starting with wave 1 (1994) • Limitations • Advantages
Ex-Post (Output) Harmonization Limitations • Different tracing rules • Different panel mortality structure Coverage of questionnaires: • Inconvertible variables • Unavailable variables • Different wording of variables • Different contents of variables
Ex-Post (Output) Harmonization Unavailable Information: Luxembourg • Labour market related variables • Household durables • Education/Training • Health • Care • Migration • Life satisfaction
Ex-Post (Output) Harmonization Unavailable Information: UK • Financial Situation (Household) • Employment related information • Health • Care • Life satisfaction
Ex-Post (Output) Harmonization Unavailable Information: Germany • Household durables • Health • Care • Migration • Life satisfaction (problems of scale) • Current (Re-)Training and Education
Ex-Post (Output) Harmonization Advantages • Reliable data sources • Available range and depth of information • Flexible integration of country-specific settings and concepts
Input/Output Harmonization For more details on ECHP related harmonization see: Roland Günther (2003): CHINTEX Working paper #19.http://www.destatis.de/chintex/proj_des/wp_1.htm
Files to use • PDB-UDB.xls • Country-File (as example for the two German samples)