There hasn’t been a huge push. What law firms did in the 1980s and 1990s was basically decide “we’re going to hire an equal number of men and women.” Eventually, women came to see law as a career women could pursue because there were lots of women in the profession. There were other women to be mentors and role models and friends. Eventually, the need for affirmative measures evaporated.

Having done both, I just find it difficult to believe that substantive preference (rather than the preference not to be in a single gender environment) has anything to do with it. I’m surrounded by highly analytical left brained women who dissect mortgage backed securities for a living. I think they would’ve been great programmers. But the path to being a programmer starts with being the only girl in your high school CS class, and that’s a huge disincentive.