The women with careers were four-and-a-half times more likely than men to say they preferred to work fewer than 40 hours per week. The men placed greater importance on ?being successful in my line of work? and ?inventing or creating something that will have an impact,? while the women found greater value in ?having strong friendships,? ?living close to parents and relatives,? and ?having a meaningful spiritual life.? ...He calls it the Inequality Taboo.
I have omitted perhaps the most obvious reason why men and women differ at the highest levels of accomplishment: men take more risks, are more competitive, and are more aggressive than women.
Update: Steve Sailer comments. He has other articles here.