You've probably heard that men are paid more than women are paid over their lifetimes. But what does that mean? Are women paid less because they choose lower-paying jobs? Is it because more women work part time than men do? Or is it because women tend to be the primary caregivers for their children? The American Association of University Women's (AAUW's) "The Simple Truth about the Gender Pay Gap" succinctly addresses these issues by going beyond the widely reported 77 percent statistic. The report explains the pay gap in the United States; how it affects women of all ages, races, and education levels; and what you can do to close it.