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保险市场中的不完美私人信息

Imperfect Private Information in Insurance Markets
Review of Economics and Statistics · 2026 · Adam R. Solomon

中文摘要

本文研究在合约内生响应的情形下,保险市场中私人信息被不完美感知的问题。均衡合约、混同与福利取决于风险与感知错误的联合分布。在健康与退休研究(HRS)中,我表明感知错误通常与(医疗、长期护理、残疾和死亡)风险类型协变:高风险类型低估自身风险,低风险类型高估自身风险。我开发了一个通用模型和算法,用以估计感知错误的均衡合约、混同及福利影响,该模型和算法适用于许多场景。我提供了来自美国年金市场的提示性证据,表明合约因感知错误而被扭曲,福利可能增加。

Abstract

Abstract This paper studies imperfectly perceived private information in insurance markets when contracts endogenously respond. Equilibrium contracts, pooling, and welfare depend on the joint distribution of risk and misperception. In the Health and Retirement Study (HRS), I show that misperceptions typically covary with (medical, long-term care, disability, and mortality) risk type: high types underperceive their risk and low types overperceive. I develop a general model and algorithm to estimate the equilibrium contracts, pooling, and welfare impact of misperceptions that is applicable in many settings. I offer suggestive evidence from U.S. annuity markets that contracts are distorted due to misperceptions, with welfare likely increasing.
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