larger age gaps, like second marriages themselves, have a higher risk of divorce.

Marriages are more likely to end in divorce when the wife makes more money than the husband. Male unemployment, for example, raises the risk of divorce.

It’s well established that women initiate the vast majority of divorces – about 70% of them (though the specific number varies by source).  If women filed for divorce at the same rate as men, it would cut the number of divorces in half.