The simplest reason is when you consider the initial disruption, pay differences, and to an extent social expectations it becomes relatively more expensive. This accumulates with more children — even if you have a stay-at-home dad, the mother is still going to pay a substantial cost for each birth.
Whether that happens in aggregate, I don’t know, but it certainly explains some of the effect.
I’d bet that the number of women who can support a family solely on their income is fairly small. The average woman makes about $150 less per week than the average man. Continue reading “‘Feminists: why are there so few stay at home dads?’”