Journal Article

Sleeping with the enemy: partners' heterogamy by political preferences and union dissolution. Evidence from the United Kingdom

Arpino, B., Di Nallo, A.

Demography, 1–27 (2025)

DOI:10.1215/00703370-11983537

Open Access

Abstract

We examine whether union dissolution is associated with partners’ (mis)match on political preferences, defined as self-reported closeness, intention to vote, or reported vote for a specific party. Previous studies have shown that partners’ heterogamy by ethnicity, education, and other dimensions increases the risk of union dissolution because of differences between partners in lifestyles, attitudes, and beliefs or because of disapproval from family and community members. We posit that similar arguments can apply to political heterogamy and test this hypothesis using UK data from the British Household Panel Study and the UK Household Longitudinal Study. The data offer a unique opportunity to assess the role of heterogamy by political preferences while controlling for heterogamy in other domains and for other partners’ characteristics over a long period (1991–2019). The data also facilitate a more specific analysis of the referendum on the United Kingdom's permanence in the European Union (known as the Brexit referendum). We find a positive association between political heterogamy and union dissolution, which is as strong as some other forms of heterogamy. The role of diverging opinions on the Brexit referendum in union dissolutions appears to be even more important than the role of partners’ differing party preferences.