Interim efficient allocations under uncertainty

• 成果类型: Article
• 署名作者: Kajii, Atsushi; Ui, Takashi
• 署名单位: Kyoto University; Yokohama National University
• 刊物名称: JOURNAL OF ECONOMIC THEORY
• ISSN/ISSBN: 0022-0531
• DOI: 10.1016/j.jet.2008.05.006
• 发表日期: 2009
• 页码: 337-353
• 关键词: Multiple priors; interim efficiency; No trade; dynamic consistency; Rectangular prior set

摘要

This paper considers an exchange economy under uncertainty with asymmetric information. Uncertainty is represented by multiple priors and posteriors of agents who have either Bewley's incomplete preferences or Gilboa-Schmeidler's maximin expected utility preferences. The main results characterize interim efficient allocations under uncertainty; that is, they provide conditions on the sets of posteriors, thus implicitly on the way how agents update the sets of priors, for non-existence of a trade which makes all agents better off at any realization of private information. For agents with the incomplete preferences, the condition is necessary and sufficient, but for agents with the maximin expected utility preferences, the condition is sufficient only. A couple of necessary conditions for the latter case are provided. (C) 2008 Elsevier Inc. All rights reserved.