@inbook{Lutz2012, author = {Lutz, W. and Basten, S. and Striessnig, E.}, title= {Optimal fertility}, year = {2012}, editor = {Kaufman, E. }, editor = {Wilcox, B.}, booktitle = {Whither the Child? Causes and Consequences of Low Fertility}, address = {Boulder, CO}, publisher = {Paradigm Press}, pages = {205--233}, }