对于慈善行为存在过三种解释:1、完全利他。别人的福利提高就是他的最主要目的。2、潜在自利。如改善穷人经济条件,万一自己那天落魄街头,希望得到别人同样的待遇。3、自利。如捐助医疗研究的人,希望未来自己能用的上此研究成果。以上是对慈善行为人来说是慈善物品的影响可以度量的,如果慈善物品过大,或者捐赠者过多而使得慈善行为人不能够体验到他们捐赠的影响,就会出现搭便车行为。于是出现了:(温情)warm-glow。 There are three explanations for philanthropy: Altruism altogether. The improvement of other people’s welfare is his main purpose. 2, potentially self-interested. Such as improving the economic conditions of the poor, in case of their own side of the streets that day, hoping to get the same treatment of others. 3, self-interest. Such as donor medical research, I hope the future can be used on the research results. The above is a measure of the impact of philanthropic goods on charities. If there are too many philanthropic items or too many donors, philanthropists can not experience the impact of their donations, and free riders will emerge. So there: (warmth) warm-glow.