近日,，美國J Pers Soc Psychol雜志發(fā)表的一項研究"The financial consequences of too many men: Sex ratio effects on saving, borrowing, and spending"表明,，當男女出生比例的失衡，男性數(shù)量大于女性時,，男人對女人會更大方,。
研究人員讓參加實驗的男人閱讀一份報告,，報告稱男女比例已經(jīng)嚴重失調(diào)，在未來女人會更少,。然后,，研究人員讓實驗者寫下他們未來的儲蓄計劃及負債預期。結(jié)果顯示,，男人們愿意每個月花掉比過去多42%的工資,，以及承擔比過去多84%的債務。
這項研究的負責人,，美國明尼蘇達州大學教授Vladas Griskevicius表示,，造成這種現(xiàn)象的主要原因在于擇偶競爭激烈，使得男人需要更多的金錢投入來獲得女人的青睞,，這與自然界中雄性之間的競爭是一樣的,。當動物世界中雌性出生率下降時，雄性往往變得更好斗,，因為它們需要更多的競爭去獲得交配的機會,。而人類與之不同的是，動物們比拼的是體力,，而人類則競爭金錢,、地位與權(quán)力。
接著,，研究人員將同樣的實驗用于女人,，結(jié)果顯示，當女人得知本地區(qū)男性比例高于女性時,，都期望自己的男友花更多錢用在約會上,，比如選擇更高級的餐廳等。Griskevicius表示：“當女人意識到自己很搶手時,，會希望男人竭盡全力的討好自己,。”
而對此，大多數(shù)男人表示認同,，他們認為當男性數(shù)量大于女性時,，自己會比過去更愿意花錢做些浪漫事兒。（生物谷Bioon.com）
doi:10.1037/a0024761
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PMID:
The financial consequences of too many men: Sex ratio effects on saving, borrowing, and spending
Griskevicius V, Tybur JM, Ackerman JM, Delton AW, Robertson TE, White AE.
The ratio of males to females in a population is an important factor in determining behavior in animals. We propose that sex ratio also has pervasive effects in humans, such as by influencing economic decisions. Using both historical data and experiments, we examined how sex ratio influences saving, borrowing, and spending in the United States. Findings show that male-biased sex ratios (an abundance of men) lead men to discount the future and desire immediate rewards. Male-biased sex ratios decreased men's desire to save for the future and increased their willingness to incur debt for immediate expenditures. Sex ratio appears to influence behavior by increasing the intensity of same-sex competition for mates. Accordingly, a scarcity of women led people to expect men to spend more money during courtship, such as by paying more for engagement rings. These findings demonstrate experimentally that sex ratio influences human decision making in ways consistent with evolutionary biological theory. Implications for sex ratio effects across cultures are discussed.
