Optimal Insurance Design Under Rank-Dependent Expected Utility
42 Pages Posted: 11 Jul 2011 Last revised: 11 Dec 2012
There are 2 versions of this paper
Optimal Insurance Design Under Rank-Dependent Expected Utility
Optimal Insurance Design Under Rank‐Dependent Expected Utility
Date Written: October 9, 2012
Abstract
We consider an optimal insurance design problem for an individual whose preferences are dictated by the rank-dependent expected utility (RDEU) theory with a concave utility function and an inverse-S shaped probability distortion function. This type of RDEU is known to describe human behavior better than the classical expected utility. By applying the technique of quantile formulation, we solve the problem explicitly. We show that the optimal contract not only insures large losses above a deductible but also insures small losses fully. This is consistent, for instance, with the demand for warranties. Finally, we compare our results, analytically and numerically, both to those in the expected utility framework and to cases in which the distortion function is convex or concave.
Keywords: optimal insurance design, rank-dependent expected utility, inverse-S shaped probability distortion, indemnity, quantile formulation, deductible
JEL Classification: G22, D81, D82
Suggested Citation: Suggested Citation
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