When husbands work fifty or more hours per week, wives with children are 44 percent more likely to quit their jobs than wives with children whose husbands work less.11 Many of these mothers are those with the highest levels of education. A 2007 survey of Harvard Business School alumni found that while men's rates of full-time employment never fell below 91 percent, only 81 percent of women who graduated in the early 2000s and 49 percent of women who graduated in the early 1990s were working full-time.12