evidence: Why Women Still Can’t Have It All [...] Millions of other working women face much more difficult life circumstances. Some are single mothers; many struggle to find any job; others support husbands who cannot find jobs. Many cope with a work life in which good day care is either unavailable or very expensive; school schedules do not match work schedules; and schools themselves are failing to educate their children. Many of these women are worrying not about having it all, but rather about holding on to what they do have. And although women as a group have made substantial gains in wages, educational attainment, and prestige over the past three decades, the economists Justin Wolfers and Betsey Stevenson have shown that women are less happy today than their predecessors were in 1972, both in absolute terms and relative to men. [...] At the core of all this is self-interest. Losing smart and motivated women not only diminishes a company’s talent pool; it also reduces the return on its investment in training and mentoring. In trying to address these issues, some firms are finding out that women’s ways of working may just be better ways of working, for employees and clients alike.