澁谷, 浩 - In: 商学討究 (Shogaku Tokyu) 64 (2013) 2/3, pp. 169-194
Most social scientists, especially economists, believe that altruists do not exist because they cannot survive exploitation by egoists. An agent-based model demonstrates, however, that altruists can survive natural selection if society comprises four types of individuals: altruists, reciprocal...