@article{Sayer2004,
author = {Sayer, L.C. 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},
}