《Berk-Nash Equilibrium: A Framework for Modeling Agents with Misspecified
Models》
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作者:
Ignacio Esponda and Demian Pouzo
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最新提交年份:
2019
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英文摘要:
We develop an equilibrium framework that relaxes the standard assumption that people have a correctly-specified view of their environment. Each player is characterized by a (possibly misspecified) subjective model, which describes the set of feasible beliefs over payoff-relevant consequences as a function of actions. We introduce the notion of a Berk-Nash equilibrium: Each player follows a strategy that is optimal given her belief, and her belief is restricted to be the best fit among the set of beliefs she considers possible. The notion of best fit is formalized in terms of minimizing the Kullback-Leibler divergence, which is endogenous and depends on the equilibrium strategy profile. Standard solution concepts such as Nash equilibrium and self-confirming equilibrium constitute special cases where players have correctly-specified models. We provide a learning foundation for Berk-Nash equilibrium by extending and combining results from the statistics literature on misspecified learning and the economics literature on learning in games.
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中文摘要:
我们开发了一个平衡框架,放松了人们对环境有正确特定看法的标准假设。每个参与者都有一个(可能是错误指定的)主观模型,该模型描述了作为行为函数的与回报相关的结果的一组可行信念。我们引入了伯克-纳什均衡的概念:每个参与者都遵循一个给定其信念的最优策略,并且她的信念被限制为她认为可能的信念集合中的最佳匹配。最佳拟合的概念形式化为最小化Kullback-Leibler发散,这是内生的,取决于均衡策略。标准解的概念,如纳什均衡和自我确认均衡,构成了特殊情况下,玩家有正确指定的模型。我们通过扩展和结合关于错误指定学习的统计文献和关于博弈学习的经济学文献的结果,为伯克-纳什均衡提供了学习基础。
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分类信息:
一级分类:Quantitative Finance 数量金融学
二级分类:Economics 经济学
分类描述:q-fin.EC is an alias for econ.GN. Economics, including micro and macro economics, international economics, theory of the firm, labor economics, and other economic topics outside finance
q-fin.ec是econ.gn的别名。经济学,包括微观和宏观经济学、国际经济学、企业理论、劳动经济学和其他金融以外的经济专题
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一级分类:Computer Science 计算机科学
二级分类:Computer Science and Game Theory 计算机科学与博弈论
分类描述:Covers all theoretical and applied aspects at the intersection of computer science and game theory, including work in mechanism design, learning in games (which may overlap with Learning), foundations of agent modeling in games (which may overlap with Multiagent systems), coordination, specification and formal methods for non-cooperative computational environments. The area also deals with applications of game theory to areas such as electronic commerce.
涵盖计算机科学和博弈论交叉的所有理论和应用方面,包括机制设计的工作,游戏中的学习(可能与学习重叠),游戏中的agent建模的基础(可能与多agent系统重叠),非合作计算环境的协调、规范和形式化方法。该领域还涉及博弈论在电子商务等领域的应用。
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