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Coûts de l’autoprotection et équilibre d’un marché de l’assurance concurrentiel

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  • Kambia-Chopin, Bidénam

    (Thema)

Abstract

This paper considers a competitive insurance market under moral hazard and adverse selection, in which both the agent’s preventive effort and self protection costs are unobservable by the insurance companies. We show that the agent provides the same level of self-protection than without adverse selection. The agent who has a higher marginal cost is proposed his moral hazard contract whereas adverse selection may make the lower marginal cost agent’s coverage to decrease. Finally, equilibrium may not exist. Nous considérons un marché concurrentiel de l’assurance en présence d’aléa moral dans lequel le niveau du coût de l’autoprotection de l’assuré est son information privée. Nous caractérisons alors l’équilibre en contrats du marché en supposant qu’il existe deux types d’agents : un type à faible coût marginal de l’effort et un autre dont le coût marginal est élevé. D’une part, nous montrons que le niveau de l’autoprotection de l’agent à l’équilibre est le même que dans la situation d’aléa moral pur. D’autre part, nous montrons qu’à l’équilibre les agents dont le coût marginal de l’effort est élevé obtiennent le même contrat que dans la situation d’aléa moral pur alors que l’autre type d’agents peut obtenir une couverture d’assurance plus faible. Enfin, l’existence de l’équilibre n’est pas toujours garantie.

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Bibliographic Info

Article provided by Société Canadienne de Science Economique in its journal L'Actualité économique.

Volume (Year): 79 (2003)
Issue (Month): 3 (Septembre)
Pages: 327-347

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Handle: RePEc:ris:actuec:v:79:y:2003:i:3:p:327-347

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