Parameter-free elicitation of utility and probability weighting functions

Parameter-free elicitation of utility and probability weighting functions

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Article ID: iaor20032003
Country: United States
Volume: 46
Issue: 11
Start Page Number: 1497
End Page Number: 1512
Publication Date: Nov 2000
Journal: Management Science
Authors:
Keywords: utility
Abstract:

This paper proposes a two-step method to successively elicit utility functions and decision weights under rank-dependent expected utility theory and its ‘more descriptive’ version: cumulative prospect theory. The novelty of the method is that it is parameter-free, and thus elicits the whole individual preference functional without imposing any prior restriction. This method is used in an experimental study to elicit individual utility and probability weighting functions for monetary outcomes in the gain and loss domains. Concave utility functions are obtained for gains and convex utility functions for losses. The elicited weighting functions satisfy upper and lower subadditivity and are consistent with previous parametric estimations. The data also show that the probability weighting function for losses is more ‘elevated’ than for gains.

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