W.E. Upjohn Institute for Employment Research, 300 S. Westnedge Ave., Kalamazoo, MI, 49007-4686, USA,
Demography. 2014 Apr;51(2):563-85. doi: 10.1007/s13524-013-0277-2.
Some conservative groups argue that allowing same-sex couples to marry reduces the value of marriage to opposite-sex couples. This article examines how changes in U.S. legal recognition laws occurring between 1995 and 2010 designed to include same-sex couples have altered marriage rates in the United States. Using a difference-in-differences strategy that compares how marriage rates change after legal recognition in U.S. states that alter legal recognition versus states that do not, I find no evidence that allowing same-sex couples to marry reduces the opposite-sex marriage rate. Although the opposite-sex marriage rate is unaffected by same-sex couples marrying, it decreases when domestic partnerships are available to opposite-sex couples.
一些保守团体认为，允许同性伴侣结婚会降低异性伴侣婚姻的价值。本文探讨了 1995 年至 2010 年间美国法律承认同性伴侣关系的法律变化如何改变了美国的结婚率。通过一种差异中的差异策略，比较了在美国各州承认同性伴侣关系的州和不承认的州，在法律承认后结婚率的变化，我没有发现允许同性伴侣结婚会降低异性伴侣结婚率的证据。尽管同性伴侣结婚不会影响异性伴侣的结婚率，但当异性伴侣可以拥有家庭伴侣关系时，异性伴侣的结婚率会下降。
