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Country report Germany

Country report Germany. Workshop “Integrating Global Census Microdata” - Lisbon, 22 August 2007- Andrea Harausz . Content. Microdata for the project “Integrated European Census Microdata” (IECM) Delivered metadata 1971 census of the former German Democratic Republic History

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Country report Germany

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  1. Country report Germany Workshop “Integrating Global Census Microdata” - Lisbon, 22 August 2007- Andrea Harausz

  2. Content • Microdata for the project “Integrated European Census Microdata” (IECM) • Delivered metadata • 1971 census of the former German Democratic Republic • History • Characteristics and metadata • Preparation • Anonymisation • Outlook

  3. Microdata for the IECM project • 9 anonymized microdata files • 2 censuses - Federal Republic of Germany • 1970 • 1987 • 2 censuses - former German Democratic Republic • 1971 • 1981 • 5 microcensuses - Federal Republic of Germany • 1973 • 1982 • 1987 • 1991 • 2001

  4. 1990´s 1980´s 1970´s 1970 . 1973 1982 1987 1991 2001 1987 1981 1971 Microdata for the IECM project

  5. Available Metadata

  6. Available Metadata

  7. Available Metadata

  8. 1971 census of the former GDR • History • Characteristics and metadata • Preparation of microdata • Anonymisation

  9. 1971 census of the former GDR • History • Central State Administration for Statistics of the GDR • Legal successor: Federal Statistical Office • Backup and documentation of data • Partly adaptation to the system of the 1987 census of the FRG • Release to the Federal Archive • Federal Archive • Data protected by data protection act • Archive law allows availability of data after 60 years • Special permission for the release of data for scientific purposes

  10. 1971 census of the former GDR • Characteristics and metadata • 2 data files • Person file (demography, income, education, employment etc.) • Dwelling and building file (state of repair, occupancy, equipment etc.) • 16,4 mio. persons, 6,2 mio. households, 6 mio. dwellings • Metadata • no codebooks at FSO and Federal Archive • Archives of regional statistical offices in the former GDR states (Field of study, occupation codes)

  11. 1971 census of the former GDR • Preparation of microdata – Matching of data files • Matching by unique combination of variables in both files • Deletion of vacant dwellings and dwellings used for other purposes • Verification of matching method by comparison of certain variables existent in both files • number of principal residents in 1st household • number of children under age 17 in 1st household

  12. 1971 census of the former GDR • Anonymisation • Time • Drawing of a subsample • Geographic detail • Recoding • Sorting of households •  fully anonymised microdata = Public Use File

  13. 1971 census of the former GDR • Sampling • Size: 25% household sample • Method: Systematic Random Sampling • Sorting of households by geographic variables • First household selected randomly from the first 4 cases • Then selecting every 4th household

  14. 1971 census of the former GDR • Geographic detail • State (Nuts1) • Construction of a size of place variable Categories: less than 2 000 2 000 - 10 000 10 000 - 50 000 50 000 and more. Berlin : less than 100 000 100 000 and more.

  15. 1971 census of the former GDR • Recoding of variables • Principle: every value of a variable should have at least 3 observations in the original file • Recoded variables (top coding): • Age • Floor space of rooms in dwelling • Number of rooms in dwelling • Number of secondary residents in household

  16. 1971 census of the former GDR • Sorting of households • Random sorting of • Building in state • Dwelling in building • Adding new running number for • Building in state • Dwelling in building • Household in dwelling

  17. 1971 census of the former GDR • Public Use File • 4,1 million persons • 50,000 in collective dwellings • 1,6 million households • 104 variables

  18. 1990´s 1980´s 1970´s 1970 . 1973 1982 1987 1991 2001 1987 1981 1971 Outlook

  19. Thank you! andrea.harausz@destatis.de www.forschungsdatenzentrum.de

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