Age Differences Between Spouses: Sociodemographic Variation and Selection

Throughout the world, marriages in which the husband is older than his wife are more common than same-age and women-older marriages. Yet there is surprisingly little systematic knowledge about within-country variation in spousal age differences. This study used comprehensive Swedish register data to investigate how age differences in newly married couples were associated with spouses' age, gender, education, income, and birthplace. Among both women and men, small age differences were most common among the highly educated, high-income earners, and native Swedes, whereas persons with low education, low income, and non-Swedish origin more often entered marriages with large age differences, particularly men-older marriages. Findings are discussed in relation to theoretical attempts to explain spousal age differences and sociodemographic selection into couples with different age relationships.