@inbook{Kaplan2001,
author = {Kaplan, H. and Bock, J.},
title= {Fertility Theory: Caldwell’s theory of intergenerational wealth flows},
year = {2001},
editor = {Hoem, J.M.},
booktitle = {International Encyclopedia of the Social and Behavioral Sciences},
address = {New York},
publisher = {Elsevier Science},
pages = {5557--5561},
}