@techreport{Baker2013,
author = {Baker, M. and Milligan, K.},
title= {Boy-Girl Differences in Parental Time Investments: Evidence from Three Countries},
year = {2013},
URL = {http://www.nber.org/papers/w18893},
publisher = {National Bureau of Economic Research},
address = {Cambridge, MA},
number = {NBER Working Paper No. 18893},
}