Many factors contribute to a stable marriage, including the marital status of your spouse's parents (folks with divorced parents are significantly more likely to get divorced themselves), age at first marriage, race, religious beliefs and socio-economic status. And, of course, many working women are indeed happily and fruitfully married--it's just that they are less likely to be so than nonworking women. And that, statistically speaking, is the rub.
To be clear, we're not talking about a high school dropout minding a cash register. For our purposes, a "career girl" has a university-level (or higher) education, works more than 35 hours a week outside the home and makes more than $30,000 a year.
If a host of studies are to be believed, marrying these women is asking for trouble. If they quit their jobs and stay home with the kids, they will be unhappy (Journal of Marriage and Family, 2003). They will be unhappy if they make more money than you do (Social Forces, 2006). You will be unhappy if they make more money than you do (Journal of Marriage and Family, 2001). You will be more likely to fall ill (American Journal of Sociology). Even your house will be dirtier (Institute for Social Research).
Why? Well, despite the fact that the link between work, women and divorce rates is complex and controversial, much of the reasoning is based on a lot of economic theory and a bit of common sense. In classic economics, a marriage is, at least in part, an exercise in labor specialization. Traditionally, men have tended to do "market" or paid work outside the home, and women have tended to do "nonmarket" or household work, including raising children. All of the work must get done by somebody, and this pairing, regardless of who is in the home and who is outside the home, accomplishes that goal. Nobel laureate Gary S. Becker argued that when the labor specialization in a marriage decreases--if, for example, both spouses have careers--the overall value of the marriage is lower for both partners because less of the total needed work is getting done, making life harder for both partners and divorce more likely. And, indeed, empirical studies have concluded just that.
