TY - RPRT A1 - Frejka, T. A1 - Sardon, J.-P. T1 - Cohort Birth Order, Parity Progression Ratio and Parity Distribution Trends in Developed Countries Y1 - 2006 PB - Max Planck Institute for Demographic Research CY - Rostock IS - MPDIR Working Paper WP 2006-045 ER -