A study of 2,757 participants from the National Longitudinal Survey of Youth examined how spouses’ relative earnings (i.e., who makes more money) influences likelihood of cheating. Results indicate absolute income did not predict infidelity, so simply earning more money did not make a person more likely to cheat. However, being the breadwinner (i.e., earning more than a spouse) was associated with men being more likely to cheat; the opposite was true for women– they were less likely to cheat when they made more money than their husbands. Being economically dependent on a spouse (i.e., one spouse makes a lot more than the other) was associated with increased likelihood of cheating in both men and women, though the effect was stronger in men.
Munsch, C. L. (2015). Her support, his support: Money, masculinity, and marital infidelity. American Sociological Review, 80, 469-495. doi: 10.1177/0003122415579989