“… ‘A new period of life is emerging in which young people are no longer adolescents but not yet adults,’ Mr. Furstenberg said. National surveys reveal that an overwhelming majority of Americans, including younger adults, agree that between 20 and 22, people should be finished with school, working and living on their own. But in practice many people in their 20s and early 30s have not yet reached these traditional milestones. Marriage and parenthood — once seen as prerequisites for adulthood — are now viewed more as lifestyle choices, according to a new report released by Princeton University and the Brookings Institution. The stretched-out walk to independence is rooted in social and economic shifts that started in the 1970s, including a change from a manufacturing to a service-based economy that sent many more people to college, and the women’s movement, which opened up educational and professional opportunities. Women account for more than half of college students and nearly half of the work force, which in turn has delayed motherhood and marriage.”