前几天,还得到陈叶烽老师送的一本:很高兴。回答一下对自私基因为什么在社会中不占优的解释,Fehr认为是社会规范,抑制了搭便车的可能性,他的文章写到:A key argument against the empirical plausibility of group selection in the evolution of human altruism is that migration between groups removes the differences between groups. If a few selfish individuals join groups that are predominantly composed of altruistic individuals, the selfish individuals will reproduce at a higher rate, quickly removing the differences in the composition of selfish and altruistic individuals across groups. Thus, group selection cannot become operative. However, selfish migrants may not be able to reproduce at a higher rate in the presence of social norms proscribing individually selfish behavior because they are punished for violation of the norm.
我还是相信经济学可以让这个社会更好的。