arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1708.05705physics.soc-ph
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公益游戏合作:留,但不能太久

Cooperation in public goods games: stay, but not for too long

Lucas Wardil, Marco A. Amaral

摘要:

在重复的公共物品博弈中,除非存在权变行为,否则合作很难实现。当然,如果合作者之间存在促进积极分类的机制,那么合作者可能会击败背叛者,因为合作者会获得更大的回报。在进化博弈论的背景下,总是合作的个体无法在混合良好的种群中赢得对背叛者的竞争。在这里,我们研究了人口的进化,在重复的公共产品游戏中获得健身和球员有一个固定的概率玩下一轮。因此,在游戏过程中,团队的规模会减小。人口是混合的,只有两种可用的策略:总是合作(ALLC)或总是背叛(ALLD)。通过数值计算和分析近似,我们表明,合作可以出现,如果球员留在玩游戏,但不是太长时间。基本的机制是从强到弱利他主义的过渡之间的相互作用,作为组的大小减少,并存在一个上限的轮数代表有限的时间可用性。

英文摘要:

Cooperation in repeated public goods game is hardly achieved, unless contingent behavior is present. Surely, if mechanisms promoting positive assortment between cooperators are present, then cooperators may beat defectors, because cooperators would collect greater payoffs. In the context of evolutionary game theory, individuals that always cooperate cannot win the competition against defectors in well-mixed populations. Here, we study the evolution of a population where fitness is obtained in repeated public goods games and players have a fixed probability of playing the next round. As a result, the group size decreases during the game. The population is well-mixed and there are only two available strategies: always cooperate (ALLC) or always defect (ALLD). Through numerical calculation and analytical approximations we show that cooperation can emerge if the players stay playing the game, but not for too long. The essential mechanism is the interaction between the transition from strong to weak altruism, as the group size decreases, and the existence of an upper limit to the number of rounds representing limited time availability.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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