Eshel, I.; Samuelson, L.; Shaked, A. - Wisconsin Madison - Social Systems - 1996
We study a population of agents , each of whome can be an Altruist or an Egoist. Altruism is a strictly dominated strategy. Agent choose their actions by imitating others who earn high payoffs. Interactions between agents are local, so that each agent affects (and is affected by) only his neighbors.