"More than twenty years ago, sociologist and University of California, Berkeley, professor Arlie Hochschild set off a tidal wave of conversation and controversy with her bestselling book, The Second Shift. In it, she examined what really happens in dual-career households. Adding together time in paid work, child care, and housework, she found that working mothers put in a month of work a year more than their spouses. Updated for a workforce now half...