Average weekly hours of work did not decline more than in previous bad recessions and have begun to increase.

FORBES: America's Two Economies

Similarly, a study of University of Chicago MBAs, with Marianne Bertrand, found that, a decade after graduation, women with children work on average 24% fewer weekly hours than men. (Women without children work about 3% fewer hours.) Only half of them work full-time.

WSJ: Virginia Postrel on the Mommy Track | Commerce & Culture