The Stability of Same‐Sex Cohabitation, Different‐Sex Cohabitation, and Marriage

This study contributes to the emerging demographic literature on same‐sex couples by comparing the level and correlates of union stability among 4 types of couples: (a) male same‐sex cohabitation, (b) female same‐sex cohabitation, (c) different‐sex cohabitation, and (d) different‐sex marriage. The author analyzed data from 2 British birth cohort studies: the National Child Development Study ( N = 11,469) and the 1970 British Cohort Study ( N = 11,924). These data contain retrospective histories of same‐sex and different‐sex unions throughout young adulthood (age 16–34) from 1974 through 2004. Event‐history analyses showed that same‐sex cohabitations have higher rates of dissolution than do different‐sex cohabiting and marital unions. Among same‐sex couples, male couples had slightly higher dissolution rates than did female couples. In addition, same‐sex couples from the 1958 and 1970 birth cohorts had similar levels of union stability. The demographic correlates of union stability are generally similar for same‐sex and different‐sex unions.