Wonkblog: A new book answers why it's so hard for educated women to find dates

For many women these days, it's not "He's just not that into you" that's the problem. It's that "There aren't enough of him."So says Jon Birger, the author of a new book called "Date-onomics: How Dating Became a Lopsided Numbers Game." The book, which Birger describes as "the least romantic book ever written about dating," uses demographics, statistics, game theory and other wonky techniques to shed light on the surprising and growing gap between the number of college-educated women and the numb...