host: joining us from nashville, tennessee, is sarah jane glynn.s with the center for american progress and the director of women's economic policy. good morning. thank you very much for being with us. guest: good morning. host: let's talk about women in the work place. what percent is it? guest: so, at this point, we've got the majority of all mothers working outside the home, more than 60%, so around 2/3 of all moms work, and that includes the majority of mothers who have very young kids. so even moms whose youngest child is under 5 and not yet started school, they're still working in in a yort numbers as well. that's a huge shift from just a few generations agoing when she we had this donna reed model, where oftentimes in middle-class families, mom would stay home and take care of the children. now, in most families, all the parents work. host: let's talk about a couple of facts. first of all, women now earn a majority of the college degrees, outpacing men, and yet your study indicates that there's still a very significant wage disparity. why? g