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Oh, No: It's a Girl!
Do daughters cause divorce?
By Steven E. Landsburg

If you want to stay married, three of the most ominous words you'll ever hear are "It's a girl." All over the world, boys hold marriages together, and girls break them up.

In the United States, the parents of a girl are nearly 5 percent more likely to divorce than the parents of a boy. The more daughters, the bigger the effect: The parents of three girls are almost 10 percent more likely to divorce than the parents of three boys. In Mexico and Colombia the gap is wider; in Kenya it's wider still. In Vietnam, it's huge: Parents of a girl are 25 percent more likely to divorce than parents of a boy.

Ever since the economists Gordon Dahl (at the University of Rochester) and Enrico Moretti (at UCLA) established these facts a few months ago, they and their colleagues (and not a few of their colleagues' friends and families) have been spinning hypotheses about what's behind the numbers....