Serial Cohabitation in Young Adulthood: Baby Boomers to Millennials

Age at first marriage in the United States has consistently increased while age at cohabitation has stalled. These trends present an opportunity for serial cohabitation (multiple cohabiting unions). The authors argue that serial cohabitation must be measured among those at risk, who have ended their first cohabiting union. Drawing on data from the National Survey of Family Growth Cycle 6 (2002) and continuous (2006–2013) interview cycles, the authors find that serial cohabitation is increasing among women at risk. Millennials, born 1980 to 1984, had 50% higher rates of cohabiting twice or more after dissolving their first cohabitation. This increase is not driven by the composition of Millennials at risk for serial cohabitation. This work demonstrates the importance of clearly defining who is at risk for serial cohabitation when reporting estimates as well as continuing to examine how the associations between sociodemographic characteristics and serial cohabitation may shift over time.