@article{Sayer2004,
author = {Sayer, L. and Bianchi, S. and Robinson, J.},
title= {Are Parents Investing Less in Children? Trends in Mothers’ and Fathers’ Time with Children},
year = {2004},
doi = {10.1086/386270},
journal = {American Journal of Sociology},
volume = {110},
number = {1},
pages = {1--43},
}