关于帕累托效率与贝叶斯激励相容性的一般不可能性定理
A General Impossibility Theorem on Pareto Efficiency and Bayesian Incentive Compatibility
AI总结:
本文针对无货币转移、参与者类型为私人随机变量的通用社会选择问题,证明满足事前帕累托效率与贝叶斯激励相容性的基数社会选择函数必然是独裁式的,该结论适用任意数量参与者与备选方案,且对类型分布假设较弱。
摘要:
本文研究了一类通用的社会选择问题,其中参与者的收益函数(或类型)是私人可观测的随机变量,且不涉及货币转移。我们考虑基数社会选择函数,这类函数既可以响应参与者的偏好排序,也可以响应其偏好强度。我们证明,一个社会选择函数是事前帕累托有效且满足贝叶斯激励相容性的,当且仅当它是独裁式的。该结果对任意数量的参与者和备选方案均成立,且仅需对类型的联合分布施加相当弱的假设,允许存在任意相关性与不对称性。
英文摘要:
This paper studies a general class of social choice problems in which agents' payoff functions (or types) are privately observable random variables, and monetary transfers are not available. We consider cardinal social choice functions which may respond to agents' preference intensities as well as preference rankings. We show that a social choice function is ex ante Pareto efficient and Bayesian incentive compatible if and only if it is dictatorial. The result holds for arbitrary numbers of agents and alternatives, and under a fairly weak assumption on the joint distribution of types, which allows for arbitrary correlations and asymmetries.
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。