Educational expansion and homogamy. An analysis of the consequences of educational upgrading for assortative mating in Switzerland

We analyze the changing relationship between education and assortative mating over the course of educational expansion in Switzerland between 1970 and 2000. The main question is whether educational expansion has resulted in increased openness of partnership opportunities or whether the educational system became increasingly important for assortative mating. Census data is used to describe this social change employing a cohort design. Over time and across cohorts, the proportion of people who live without a partner has increased, but the educational classes became more similar with respect to partnerlessness. At the same time, overall educational homogamy of partnerships has remained rather stable, although there were different trends for each of the educational levels. Educational expansion has contributed to increasing heterogamy for less educated and untrained persons while homogamy has increased for persons achieving intermediate and higher levels of education. However, after taking opportunity structure into account, the inclination for educational homogamy is actually more pronounced in the lower educational groups than in the higher and, in particular, the intermediate educational groups. In this respect, one can speak of a polarization of assortative mating with social closure at the lower end of the educational scale and relative openness for intermediate educational classes. This polarization, however, declined somewhat in the course of educational expansion.