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arXiv 2608.29506econ.TH

纯风险

Pure Risk

  • University of Pennsylvania(宾夕法尼亚大学)
  • University of California, Los Angeles(加利福尼亚大学洛杉矶分校)

机构由 AI 辅助整理,请以论文原文为准。

David Dillenberger, Jay Lu

中文总结 AI 辅助

该研究提出了一种区分风险态度与确定性效用的特定领域纯风险厌恶概念,构建了跨领域风险态度可变的模型,确定了模型参数唯一性并给出公理化刻画。

中文摘要 AI 辅助

我们引入了一种针对特定领域的风险厌恶的行为概念,它将风险态度与确定性效用分离开来:对于在确定性下无差异的奖品,如果一个主体在某一领域比在另一领域更厌恶风险,那么该主体在前者领域的纯风险厌恶程度更高。我们开发了一个超越期望效用的模型,允许风险态度在不同领域间变化,同时保持每个领域内的期望效用不变。这些领域是主观的,无需预先指定,可从选择行为中识别出来。我们确定了该模型参数的唯一性,并提供了公理化刻画。

英文摘要

We introduce a behavioral notion of domain-specific risk aversion that separates attitudes toward risk from deterministic utility: an agent is more pure risk averse in one domain than in another if, for prizes that are indifferent under certainty, he is more averse to risk in the former domain than in the latter. We develop a model that goes beyond expected utility by allowing risk attitudes to vary across domains, while preserving expected utility within each domain. The domains are subjective and need not be specified in advance; they are identified from choice behavior. We establish uniqueness of the model's parameters and provide an axiomatic characterization.

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