@article{Fried1979,
author = {Fried, E.S. and Udry, J.R.},
title= {Wives’ and husbands’ expected costs and benefits of childbearing predictors of pregnancy},
year = {1979},
doi = {10.1080/19485565.1979.9988385},
journal = {Biodemography and Social Biology},
volume = {26},
number = {4},
pages = {265--274},
}