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Economic Darwinism

机译:经济达尔文主义

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We define an evolutionary process of "economic Darwinism" for playing the field, symmetric games. The process captures two forces. One is "economic selection": if current behavior leads to payoff differences, behavior yielding lowest payoff has strictly positive probability of being replaced by an arbitrary behavior. The other is "mutation": any behavior has at any point in time a strictly positive, very small probability of shifting to an arbitrary behavior. We show that behavior observed frequently is in accordance with "evolutionary equilibrium", a static equilibrium concept suggested in the literature. Using this result, we demonstrate that generally under positive (negative) externalities, economic Darwinism implies even more under- (over-)activity than does Nash equilibrium.
机译:我们定义了“经济达尔文主义”的演变过程,以进行对称的游戏领域。该过程捕获了两种力量。一种是“经济选择”:如果当前行为导致收益差异,则产生最低收益的行为具有被任意行为替代的严格正概率。另一个是“变异”:任何行为在任何时间点都具有绝对正的,很小的概率转移到任意行为。我们表明,经常观察到的行为符合“进化平衡”,这是文献中提出的静态平衡概念。利用这一结果,我们证明,通常在正(负)外部性下,经济达尔文主义比纳什均衡所暗示的活动不足(过度)。

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