This article uses data from the 1987-1988 National Survey of Families
and Households to study the determinants of religious intermarriage in
the United States as well as changes over time in its prevalence. Sep
arate legit regressions are estimated for exclusivist Protestant, ecum
enical Protestant, and Catholic respondents. Variables identified as p
laying a role in the intermarriage decision include the proportion of
coreligionists in the relevant marriage market, various proxies for re
ligiosity and for commitment to the parental faith, education, a prema
rital pregnancy, and gender. The estimated effects are generally consi
stent with hypotheses derived from a model of religious intermarriage.
The results also show that the prevalence of religious heterogamy has
increased significantly over the past decades for Catholics and ecume
nical Protestants. Ln sharp contrast, there has been no perceptible ch
ange in the probability of marrying outside the religion for exclusivi
st Protestants, a group which continues to display distinctive pattern
s of economic and demographic behavior. (C) 1998 Academic Press.