The last 60 years have seen the emergence of a dramatic socioeconomic gradient in marriage, divorce, cohabitation, and childbearing. The divide is between college graduates and others: those without four-year degrees have family patterns and trajectories very similar to those of high school...

Since 1950 the sources of the gains from marriage have changed radically. As the educational attainment of women overtook and surpassed that of men and the ratio of men's to women's wage rates fell, traditional patterns of gender specialization in work weakened. The primary source of the gains...