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Abstract
This article addresses open questions about the nature and meaning of the positive
association between marriage and well-being, namely, the extent to which it is causal,
shared with cohabitation, and stable over time. We relied on data from the National
Survey of Families and Households (N = 2,737) and a modeling approach that controls
for fixed differences between individuals by relating union transitions to changes
in well-being. This study is unique in examining the persistence of changes in well-being
as marriages and cohabitations progress (and potentially dissolve) over time. The
effects of marriage and cohabitation are found to be similar across a range of measures
tapping psychological well-being, health, and social ties. Where there are statistically
significant differences, marriage is not always more advantageous. Overall, differences
tend to be small and appear to dissipate over time, even when the greater instability
of cohabitation is taken into account.