@article{Morgan2001,
author = {Morgan, S.P. and King, R.B.},
title= {Why have children in the 21st century? Biological predisposition, social coercion, rational choice},
year = {2001},
doi = {10.1023/A:1010784028474},
journal = {European Journal of Population },
volume = {17},
number = {1},
pages = {3--20},
}