<p>From the article:
[New</a> report finds gender gap in leadership roles at Princeton University: women undergrads ‘actively discouraged’ from seeking most prominent positions | NJ.com](<a href=“http://www.nj.com/mercer/index.ssf/2011/04/new_report_finds_gender_gap_in.html]New”>New report finds gender gap in leadership roles at Princeton University: women undergrads 'actively discouraged' from seeking most prominent positions - nj.com)</p>
<p>I think you might want to look first to changes in cultural and demographic makeup of the class before speculating on other motivations. There may also be a downside to the increased level of competition to get into Princeton and other Ivies – it may make for much more highly competitive student body overall, which in turn may result in less supportive environment overall.</p>