[Introduction] This data documentation is meant to provide SOEP users with a general overview of the longitudinal development of the survey over the past 28 years and the derivation of weights that compensate for selective panel attrition. In the first section, we report the number of household...

[Introduction ...] The remainder of this paper describes the development and special features of the IAB-SOEP Migration Sample and gives an overview of the questionnaire. The IAB-SOEP Migration Sample builds both on previous experience surveying migrants in the SOEP as well as on past experience...

Like many medical studies, the Berlin Aging Study II (BASE-II) is based on a non-random "gconvenience sample" of self-recruited participants. To study processes of selectivity in BASE-II, we used a questionnaire to compare BASE-II with a large, representative reference study, the German...