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Autoren: 
Garcia, Daniel
Teper, Roee
Tsur, Matan
Datum: 
2018
Reihe/Nr.: 
CESifo Working Paper 6853
Zusammenfassung: 
This paper characterizes the optimal information structure in competitive insurance markets with adverse selection. A regulator assigns ratings to individuals according to their risk characteristics, insurers offer fixed insurance contracts to each rating group, and the market clears as in Akerlof (1970). The optimal rating system minimizes ex-ante risk subject to participation constraints. We prove that in any such market there exists a unique optimal system under which all individuals trade and the ratings match low risk types with high risk types negative assortatively. A simple algorithm yields the optimal system. We examine implications for government regulations of insurance markets.
Schlagwörter: 
insurance markets
adverse selection
information design
JEL: 
D82
Dokumentart: 
Working Paper

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