据说涌入四川救灾的志愿者多达百万。全国参与救灾的志愿者多达数百万。浩浩荡荡的志愿者队伍向人们宣示着人性的一个重要方面。将人看成是济人,是经济学为了简便而作出的假定。这种假定大致准确,但失之粗糙。经济学的发展已经在纠正这样的错误。前些年走红的实验经济学已经证明,人们其实顾意提供一定数量的公共物品;桑塔费研究所的仿真实验发现,所谓‘强互惠者’,即愿意为维护合作秩序支付个 It is said that as many as one million volunteers are pouring into Sichuan for disaster relief. There are millions of volunteers in the country participating in disaster relief. A mighty volunteer team announces to people an important aspect of humanity. To think of people as benefactors is the assumption made by economics for simplicity. This assumption is generally accurate, but not rough. The development of economics is already correcting such mistakes. Experimental economics, which became popular in previous years, has proved that people are actually interested in providing a certain amount of public goods. The simulation experiment conducted by the Santa Fe Institute found that the so-called ’strong reciprocity’ is the willingness to pay for the maintenance of cooperative order