What about the second-mentioned explanation, that men and women differ in their appetite for risk? There have been some studies conducted in behavioral finance that suggest that on computerized monetary choice tasks women are more risk averse than men. But here again, I am not entirely convinced, because other studies, of real investment behavior, show that women often outperform men over the long haul, and such outperformance is, according to formal finance theory, a sign of greater risk taking.
