@article{S.2003,
author = {S., Avellar and Smock, P.J.},
title= {Has the price of motherhood declined over time? A cross-cohort comparison of the motherhood wage penalty},
year = {2003},
doi = {10.1111/j.1741-3737.2003.00597.x},
journal = {Journal of Marriage and Family},
volume = {65},
number = {3},
pages = {597--607},
}