The following study investigates the demographics of same-sex marriages—that is, registered partnerships—in Norway and Sweden with an overview of the demographic characteristics of the spouses of these partnerships, study patterns of their divorce risks, and compare the dynamics of same-sex couples with those of heterosexual marriages.. The results show that in many respects, the distributions of married populations on these characteristics differ by the sex composition of the couples.
They note that divorce-risk levels are considerably higher in same-sex marriages and the divorce risk for female partnerships being double that for male partnerships. This is consistent with other evidence that suggests that by nature and as a rule, same-sex partnerships are less stable than heterosexual marriages. They also note that there are hardly any differences between the laws governing registered partnerships for SSC and SSM which suggests that legalising SSM made little if any difference to their legal rights and status.
Andersson, G., Noack, T., Seierstad, A. et al. Demography (2006) 43: 79. doi:10.1353/dem.2006.0001
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