Where are all the female film critics?

According to an article in the Chicago Tribune , women are vastly underrepresented in the world of film criticism:

With more online movie sites than ever, it might seem like women have more chances to get into film criticism. But a study released Friday by San Diego State professor Martha Lauzen finds that among top critics, fewer films were reviewed by women in spring 2013 than in fall 2007. [...] While the perception is that the Internet has made film criticism more democratic, in reality film critics appear to have become less, not more gender diverse over the last six years. Top male critics wrote 82% and top female critics 18% of the film reviews on Rotten Tomatoes in spring 2013, while in fall 2007, men wrote 70% and women 30% of reviews for the top 100 U.S. daily newspapers.

This isn't exactly surprisingly. Women are absent or underrepresented in most forms of criticism, notably music, which I've written about here and here. The problem is twofold, I think. Women are generally dissuaded from critical thought, and women's fandom is often considered silly or superfluous. And women who write about pop culture, especially those who write about pop culture through a feminist lens, are marginalized as "women's writers," or "feminist writers," which is not a bad thing (actually, it's a good thing), but it means their writing isn't reaching a large audience.