合作收益悖论。
The paradox of cooperation benefits.
机构信息
Institute of Sociology and Social Policy, Corvinus University of Budapest, 1093 Budapest, Közraktár u 4-6, Hungary.
出版信息
J Theor Biol. 2010 May 21;264(2):301-11. doi: 10.1016/j.jtbi.2010.02.005. Epub 2010 Feb 10.
It seems obvious that as the benefits of cooperation increase, the share of cooperators in the population should also increase. It is well known that positive assortment between cooperative types, for instance in spatially structured populations, provide better conditions for the evolution of cooperation than complete mixing. This study demonstrates that, assuming positive assortment, under most conditions higher cooperation benefits also increase the share of cooperators. On the other hand, under a specified range of payoff values, when at least two payoff parameters are modified, the reverse is true. The conditions for this paradox are determined for two-person social dilemmas: the Prisoner's Dilemma, the Hawks and Doves game, and the Stag Hunt game, assuming global selection and positive assortment.
很明显，随着合作收益的增加，群体中合作者的比例也应该增加。众所周知，例如在空间结构的种群中，合作类型之间的正选择比完全混合为合作的进化提供了更好的条件。本研究表明，假设存在正选择，在大多数情况下，较高的合作收益也会增加合作者的比例。另一方面，在特定的收益值范围内，当至少修改两个收益参数时，情况则相反。对于两人社会困境：囚徒困境、鹰鸽博弈和猎鹿博弈，在全局选择和正选择的假设下，确定了产生这种悖论的条件。
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