This study found that women who win a Best Actress Oscar have a much higher rate of divorce in the following years than the losing Best Actress nominees and the Best Actor nominees, both winning and losing. A Chinese joke I heard recently says essentially the same thing:
There are four kinds of people: 1. Man. 2. Woman. 3. Woman with a Ph.D. 4. Someone who will marry a woman with a Ph.D.
Via Marginal Revolution.