TY - RPRT A1 - Spielauer, M. A1 - Kostova, D. A1 - Koytcheva, E. T1 - First and second births in first and second unions: a decomposition of fertility decline in Bulgaria and Russia since the 1989 economic and political transition Y1 - 2007 PB - Max Planck Institute for Demographic Research CY - Rostock T3 - MPIDR Working Paper; WP-2007-001 ER -