In this paper, the authors report on cohabitation and marriage data coming from the third wave of the National Longitudinal Study of Adolescent Health, or Add Health; a national longitudinal study of adolescents and young adults beginning in 1995 that has been funded by NICHD and 17 other...

A considerable amount of research has established that the married live longer, healthier lives than the previously- and never-married. Similar research on the health benefits of cohabitation is sparse, and virtually nonexistent from adolescence into young adulthood despite substantial levels of...