The antonym «hypogamy« refers to the inverse: marrying a person of lower social class or status.
Today most people marry their approximate social equals, and in much of the world hypergamy is in slow decline: for example, it is becoming less common for women to marry older men. However, even in relatively gender-equal societies it is generally accepted that young women will often partner with powerful older men.
Studies of heterosexual mate selection in dozens of countries around the world have found men and women report prioritizing different traits when it comes to choosing a mate, with men tending to prefer women who are young and attractive and women tending to prefer men who are rich, well-educated, ambitious, and attractive. Evolutionary psychologists contend this is an inherent sex difference arising out of sexual selection, with men driven to seek women who will give birth to healthy babies and women driven to seek men who will be able to provide the necessary resources for the family’s survival. Social learning theorists, however, say women value men with high earning capacity because women’s own ability to earn is constrained by their disadvantaged status in a male-dominated society. They argue that as societies shift towards becoming more gender-equal, women’s mate selection preferences will shift as well.
Some research support that theory, including a 2012 analysis of a survey of 8,953 people in 37 countries, which found that the more gender-equal a country, the likelier male and female respondents were to report seeking the same qualities as each other rather than different ones.
However, Townsend (1989) surveyed medical students regarding their perception of how the availability of marriage partners changed as their educational careers advanced. Eighty-five percent of the women indicated that «As my status increases, my pool of acceptable partners decreases» (p. 246). In contrast, 90% of men felt that «As my status increases, my pool of acceptable partners increases» (p. 246).
Saint-Paul (2008) argued that, based on mathematical models, human female hypergamy occurs because women have greater lost mating opportunity costs from monogamous mating (given their slower reproductive rate and limited window of fertility), and thus must be compensated for this cost of marriage. Marriage reduces the overall genetic quality of her offspring by precluding the possibility of impregnation by a genetically higher quality male, albeit without his parental investment. However, this reduction may be compensated by greater levels of paternal parental investment by her genetically lower quality husband. An empirical study examined the mate preferences of subscribers to a computer dating service in Israel that had a highly skewed sex ratio (646 men for 1,000 women). Despite this skewed sex ratio, they found that «On education and socioeconomic status, women on average express greater hypergamic selectivity; they prefer mates who are superior to them in these traits… while men express a desire for an analogue of hypergamy based on physical attractiveness; they desire a mate who ranks higher on the physical attractiveness scale than they themselves do».:51
One study did not find a statistical difference in the number of women or men «marrying-up» in a sample of 1109 first-time married couples in the United States.
For citizens of rural India, hypergamy is an opportunity to modernize. Marriages in rural India are increasingly examples of hypergamy. Farmers and other rural workers want their daughters to have access to city life, for with metropolitan connections comes internet access, better job opportunities, and upper-class social circles. A connection in an urban area creates a broader social horizon for the bride’s family, and young children in the family can be sent to live with the couple in the city for better schooling. Hypergamy comes with a cost though: the dowry, which often costs as much or more than an entire house. The high price that has to be borne by parents to arrange a suitable marriage for a daughter has led to increasing rates of abortion of female fetuses.
The concept of marrying up in India is prevalent due to caste-based class stratification. The women from the higher castes were not allowed to marry men from a lower caste. This concept, cited in the Vedas as the Anuloma was justified as the mechanism to keep the Hindu ideological equivalent of the gene pool from degrading. The opposite of the Anuloma, called the Pratiloma was not allowed in the ancient Indian society. However, the Vedas cite an example where one such exception was allowed when the daughter of Sage Shukracharya, Devayani was allowed to marry a Kshatriya king (lower caste compared to Brahmanas in the Indian caste system) named Yayati.
Feminist analysis of hypergamy says the practice needs to be understood in the context of a patriarchial system: men choose attractive partners because they can, and women choose partners with material resources simply because they make life more comfortable; there are of course exceptions to this as to any other rule—men will also choose women who make their lives more comfortable. Feminist historians say lower-status families participate in hypergamy because it’s felt that the best possible use of a daughter is for her to increase the status of her natal family by marrying up. Hypergamy allows higher-status men maximum choice in mate selection, and, as historically practiced in India, results in the man’s family gaining wealth through the transfer of dowry from the bride’s family.
Overall, hypergamy has the potential to advantage lower-status women economically and socially the most, since they marry into a higher status and the dowry becomes part of their marital wealth.
This occurs at the cost of less-desirable, higher-status women (by removing high-status men from their mating pool, from which social constraints and economic disincentives already exclude lower-status men).
Lower-status men are disadvantaged the most (by removing lower-status women from their mating pool, from which social constraints and economic incentive structures already exclude higher-status women).
The overall effect is that all women have a chance to marry into a high(er)-status, whereas lower-status men do not.