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Selectivity Processes in and Weights for the Berlin Aging Study II (BASE-II)


  • Denise Saßenroth
  • Martin Kroh
  • Gert G. Wagner


Like many medical studies, the Berlin Aging Study II (BASE·II) is based on a non·random "convenience sample" of self·recruited participants. To study processes of selectivity in BASE·II, we used an identical questionnaire to compare BASE·II with a large, representative reference study, the German Socio·Economic Panel (SOEP), thereby allowing differences in characteristics of participants in BASE·II and SOEP to be analysed easily. Based on this selectivity analysis, we then generated propensityscore weights that adjust for the selectivity in the BASE·II survey. In addition, we adjusted the weights of the BASE·II sample to regional information from the Federal Statistical Office so that the BASE·II study has the same totals as the official statistics.

Suggested Citation

  • Denise Saßenroth & Martin Kroh & Gert G. Wagner, 2013. "Selectivity Processes in and Weights for the Berlin Aging Study II (BASE-II)," SOEPpapers on Multidisciplinary Panel Data Research 608, DIW Berlin, The German Socio-Economic Panel (SOEP).
  • Handle: RePEc:diw:diwsop:diw_sp608

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    Cited by:

    1. Martin Kroh & Denise Lüdtke & Sandra Düzel & Florin Winter, 2016. "Response Error in a Web Survey and a Mailed Questionnaire: The Role of Cognitive Functioning," SOEPpapers on Multidisciplinary Panel Data Research 888, DIW Berlin, The German Socio-Economic Panel (SOEP).

    More about this item


    Convenience sample; selectivity; weighting; Berlin Aging Study II; BASE·II; SOEP;

    JEL classification:

    • C18 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Methodolical Issues: General
    • C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Spatio-temporal Models
    • C8 - Mathematical and Quantitative Methods - - Data Collection and Data Estimation Methodology; Computer Programs
    • I1 - Health, Education, and Welfare - - Health

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