@article{Kravdal2014,
author = {Kravdal, Øystein},
title= {The Estimation of Fertility Effects on Happiness: Even More Difficult than Usually Acknowledged},
year = {2014},
URL = {10.1007/s10680-013-9310-9},
journal = {European Journal of Population},
volume = {30},
number = {3},
pages = {263--290},
}