This is a helpful point made by Alison Wolf in The XX Factor.
As is well known, women are now more likely to go to and complete college than men.
Part of the reason is that they can go to college now much more than women could in the past.
But another part of the reason is that traditional women's careers - which are still overwhelmingly female - require more educational credentials than they used to. Nursing and the other health care fields, in particular, are much more credentialized than they were even a generation ago.
Traditional men's careers, by contrast, such as electricians, carpenters, and plumbers, do not require a college degree. They may even require more certifications than they used to, but not the kind given by colleges.