http://www.nytimes.com/2014/08/21/upshot/how-a-part-time-pay-penalty-hits-working-mothers.html?hpw&rref=business&action=click&pgtype=Homepage&version=HpHedThumbWell&module=well-region&region=bottom-well&WT.nav=bottom-well&_r=1&abt=0002&abg=0