相信这个世界上没有哪个女人喜欢小气的男人。但是有哪些因素会影响到男人们的慷慨大方的程度呢？最近据一项调查发现，今年男女比例失调，女性数量的减少，这竟然成为男人越来越慷慨的原因之一！

    你看到这样的因果联系是不是十分震惊呢？！在女性数量相对男性较少的时候，男人们变得更加的慷慨大方来博得女人们的好感。那除此之外还有哪些更深刻的解释呢？下面我们就一起来了解一下，看看女人的数量到底是如何影响男性朋友的慷慨程度的吧。

Men turn from penny-pinching savers to big spenders if they think there is a shortage of women around them according to new research.

When men believe that competition for wives and girlfriends is increasing they become impulsive with their money and even increase their borrowing.

To test their theory that sex ratios affect economic decisions, researchers at Minnesota University's Carlson School of Management told volunteers to read articles that described their local population as having more men or more women.

They were then asked to indicate how much money they would save each month from a pay cheque, as well as how much they would borrow with credit cards for immediate expenditures.

When led to believe women were scarce, the savings rates for men decreased by 42 percent.

Men were also willing to borrow 84 percent more money each month.

In another study, participants saw photographs showing more men, more women or were neutral.

After looking at the photographs, participants were asked to choose between receiving some money tomorrow or a larger amount in a month.

When women were scarce in the photos, men were much more likely to take an immediate $20 rather than wait for $30 in a month.

Study leader Vlada Griskevicius said: 'What we see in other animals is that when females are scarce, males become more competitive. They compete more for access to mates.

'How do humans compete for access to mates? What you find across cultures is that men often do it through money, through status and through products.

'It turns out we have a lot in common with other animals. Some of our behaviours are much more reflexive and subconscious. We see that there are more men than women in our environment and it automatically changes our desires, our behaviours, and our entire psychology.'