TY - RPRT A1 - Kreyenfeld, M. A1 - Hornung, A. A1 - Kubisch, K. A1 - Jaschinski, I. T1 - Fertility and Union Histories from German GGS Data: Some Critical Reflections Y1 - 2010 PB - Max Planck Institute for Demographic Research CY - Rostock IS - MPIDR working paper no. 2010-023 ER -