If you haven't read Ariel Levy's review of Committed yet, you are missing out.
We marry most often because we are in love and we think it will make us happy. Yet married women are more likely to suffer from depression than single women are. According to Gilbert, married women are not as successful in their careers as single women. Married women are arguably less healthy than single women. Married women, until recently, were more likely to die a violent death than single women—usually, at the hands of their own husbands. Sociologists, Gilbert claims, call this phenomenon “the ‘Marriage Benefit Imbalance’—a tidy name for an almost freakishly doleful conclusion: that women generally lose in the exchange of marriage vows, while men win big.”