@techreport{Frejka2006,
author = {Frejka, T. and Sardon, J.-P.},
title= {Cohort Birth Order, Parity Progression Ratio and Parity Distribution Trends in Developed Countries},
year = {2006},
publisher = {Max Planck Institute for Demographic Research},
address = {Rostock},
number = {MPDIR Working Paper WP 2006-045},
}