@article{Zhao2018,
author = {Zhao, M.},
title= {From motherhood premium to motherhood penalty? Heterogeneous effects of motherhood stages on women’s economic outcomes in urban China.},
year = {2018},
doi = {10.1007/s11113-018-9494-0},
volume = {37},
number = {6},
pages = {967--1002},
}