Beat me to it. The episode is basically an interview with Claudia Goldin who is about as qualified a person as you could hope for to speak on this matter. [1]
tl;dr women start out with equal pay, but trade pure monetary compensation for flexibility and/or fewer hours when they have kids because society still sucks at gender equality when it comes to enabling parents to equally contribute to certain aspects of parenting due.
tl;dr women start out with equal pay, but trade pure monetary compensation for flexibility and/or fewer hours when they have kids because society still sucks at gender equality when it comes to enabling parents to equally contribute to certain aspects of parenting due.
[1] http://scholar.harvard.edu/goldin/biocv