[Contents] 1 Development of sample sizes 2 1.1 Development of the number of successful interviews by cross-section 2 1.2 Longitudinal development of losses due to panel attrition 10 1.3 Entrants by birth or move-ins and their participation behavior 14 2 Losses due to unsuccessful follow-up 15...

The paper provides information on sample sizes and panel attrition in the German Socio-Economic Panel (GSOEP) for the years 1984 – 1999. Furthermore, results of the sequential estimation of non-response probabilities for the different subsamples of the GSOEP are described in detail.