Landing a "top job" is a zero sum game: on top of skill and intellect, you've also got to put in more labor and hours than anyone else to get there. For a large

Landing a "top job" is a zero sum game: on top of skill and intellect, you've also got to put in more labor and hours than anyone else to get there. For a large constellation of reasons, women are more likely to choose to put extra hours into childcare, and men are more likely to choose to put extra hours into the kind of market labor that lends itself to reaching those top tier jobs.