@article{Margolis2011,
author = {Margolis, R. and Myrskylä, M.},
title= {A global perspective on happiness and fertility},
year = {2011},
doi = {10.1111/j.1728-4457.2011.00389.x},
journal = {Population and Development Review},
volume = {37},
number = {1},
pages = {29--56},
}