In the year following a divorce, women's living standards fall by 27 percent while men's living standards rise by 10 percent. What explains this?
...A 30-year-old woman who wants a family is getting close to the point where she has to choose the best of her available suitors. A 30-year-old man can always choose to wait another five or 10 years till someone better comes along. In general, the longer you spend searching for something—be it a car, a house, or a life partner—the happier you're going to be with the one you end up with. So—again, with myriad exceptions—a woman's optimal strategy is to settle for an imperfect mate and then try to change him. A man's optimal strategy is to search until he finds someone close to perfect. It's therefore no surprise that women, more often than men, should end up regretting their choices.
In hindsight, it all makes sense. Once you realize there's a biological clock, you should be able to predict that men (having searched long and hard for the perfect partner) would make financial sacrifices to preserve their marriages, and that women who stay married to imperfect partners would be kept in their marriages by financial rewards—or, to say the same thing another way, that women who leave their marriages would make financial sacrifices. (And you should also be able to make a lot of auxiliary predictions, such as this one: Wives try harder to mold their husbands than husbands try to mold their wives—because husbands wait until they've found wives who need relatively little molding.) Fairness never had anything to do with it.