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...

In this paper we discuss the rationale for tracing non-original sample members (Non-OSMs) in household panel studies, and in particular in SOEP, and the implications for weighting. We present results on the incidence, survival rates, and thus the relevance of Non-OSMs in the SOEP

Im Januar des Jahres 2008 begann die Feldarbeit der 25. Welle des SOEP. Im Jahr 2009 werden damit etwa 2 500 anonymisierte Datensätze von Personen zur Auswertung zur Verfügung stehen, die seit 1984 ununterbrochen an 25 Befragungen in den westdeutschen SOEP-Teilstichproben A und B teilgenommen...

The Berlin Aging Study II (BASE-II) is a multidisciplinary study that allows for the investigation of how a multitude of health status factors as well as many other social and economic outcomes interplay. The sample consists of 1,600 participants aged 60 to 80, and 600 participants aged 20 to...