Hypergamy (colloquially referred to as "dating up" or "marrying up") is a term used in social science for the act or practice of a person dating or marrying a spouse of higher caste, social status or sexual capital than themselves. The antonym "hypogamy" refers to the inverse: marrying a person of lower social class or status (colloquially "marrying down"). Both terms were invented in the Indian subcontinent in the 19th century while translating classical Hindu law books, which used the Sanskrit terms anuloma and pratiloma, respectively, for the two concepts. The term hypergyny is used to describe the overall practice of women marrying up, since the men would be marrying down. One study found that women are more selective in their choice of marriage partners than are men. A study done by the University of Minnesota in 2017 found that females generally prefer dominant males as mates. Research conducted throughout the world strongly supports the position that women prefer marriage with partners who are culturally successful or have high potential to become culturally successful. The most extensive of these studies included 10,000 people in 37 cultures across six continents and five islands. Women rated "good financial prospect" higher than did men in all cultures. In 29 samples, the "ambition and industriousness" of a prospective mate were more important for women than for men. Meta-analysis of research published from 1965 to 1986 revealed the same sex difference (Feingold, 1992). Across studies, 3 out of 4 women rated socioeconomic status as more important in a prospective marriage partner than did the average man. Gilles 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.