Adverse Selection and Moral Hazard In Insurance: Can Dynamic Data Help to Distinguish?

Jaap Abbring, James Heckman, Pierre Chiappori and Jean Pinquet

Journal of the European Economic Association, 2003, vol. 1, issue 2-3, 512-521

Abstract: A standard problem of applied contracts theory is to empirically distinguish between adverse selection and moral hazard. We show that dynamic insurance data allow to distinguish moral hazard from dynamic selection on unobservables. In the presence of moral hazard, experience rating implies negative occurrence dependence: individual claim intensities decrease with the number of past claims. We discuss econometric tests for the various types of data that are typically available. Finally, we argue that dynamic data also allow to test for adverse selection, even if it is based on asymmetric learning. (JEL: D82, G22, C41, C14) Copyright (c) 2003 The European Economic Association.

Date: 2003
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