Article ID: | iaor20042285 |
Country: | United States |
Volume: | 49 |
Issue: | 7 |
Start Page Number: | 979 |
End Page Number: | 981 |
Publication Date: | Jul 2003 |
Journal: | Management Science |
Authors: | Wakker Peter P. |
Keywords: | Utility theory, prospect theory |
Levy and Levy present data that, according to their claims, violate prospect theory. They suggest that prospect theory's hypothesis of an S-shaped value function, concave for gains and convex for losses, is incorrect. However, all the data of Levy and Levy are perfectly consistent with the predictions of prospect theory, as can be verified by simply applying prospect theory formulas. The mistake of Levy and Levy is that they, incorrectly, thought that probability weighting could be ignored.