基于策略、成本的移动机制对合作的影响

面对一般意义的社会合作困境,基于合作的演化理论成为经济学、生物学和社会学中重要的研究内容。本文在二维方格上的囚徒困境博弈中引入一个基于策略与成本的移动机制,通过计算机仿真模拟了行为群体的动态演化过程。结果表明：基于策略与成本的移动机制在较广的参数空间内提高了合作水平;同时,模型逻辑也揭示其主要原因在于两个方面,其一,基于策略的移动机制有效地促进了网络中合作者团块的涌现,为合作者的出现提供了有利的条件;另一方面,基于成本的移动有效地调节了主体移动的速率。合作者团块的出现增加了合作者的收益进而减少了背叛者寻找合作者的速率,为稳定的合作秩序的演化提供了有利的保证。

Effect of migration based-on strategy and cost on the evolution of cooperation

Mainstream economics assumes that human is selfish, but cooperation between people is widespread, which is called the social dilemma. Resolving social dilemma, namely co - evolution is an important research in economics, biology and sociology. We introduced migration based -on strategy and cost into Prisoner＇s Dilemma game on a two -dimensional grid. The dynamic evolution behavior of groups was simulated by computer simulation. The result shows that moving mechanism based - on strategy and cost improved the level of cooperation in a wide parameter space. This was mainly caused by two reasons, on the one hand, movement based - on strategy effectively promoted the emergence of cooperation clumps, which provide favorable conditions for the emergence of cooperation. On the other hand, moving based - on the cost effectively regulated the rate of movement. The emergence of cooperators clumps increased earnings of cooperators, thereby reducing the rate of defectors to find cooperators, which provided a favorable guarantee for the evolution of cooperation.