Separating attitudes towards money from attitudes towards probabilities: Stake effects and ambiguity as a test for prospect theory
Prospect theory (PT) is the dominant descriptive theory of decision making under risk today. For the modeling of choices, PT relies on a psychologically founded separation of risk attitudes into attitudes towards outcomes, captured in a value function; and attitudes towards probabilities, captured in a probability weighting function. However, while it is theoretically sound, it is unclear whether this clear separation is reflected in actual choices. To test this, we designed two experiments. In the first experiment, we elicit the value and probability weighting functions both under known and unknown probabilities. The results support PT and show that the value function is unaffected by the nature of the probabilities, which only affects probability weighting. More in general, this finding supports theories that represent ambiguity attitudes through probability transformations rather than utility transformations. In the second experiment, we examine the effects of an increase in stakes on risk attitudes. We find that the stake increase is not reflected in the value function, but rather in the weighting function, thus contradicting PT's prediction.
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- von Gaudecker, H.M. & van Soest, A.H.O. & Wengstrom, E., 2011.
"Heterogeneity in risky choice behavior in a broad population,"
Other publications TiSEM
d4881c0f-4798-404d-b796-5, Tilburg University, School of Economics and Management.
- Hans-Martin von Gaudecker & Arthur van Soest & Erik Wengstrom, 2011. "Heterogeneity in Risky Choice Behavior in a Broad Population," American Economic Review, American Economic Association, vol. 101(2), pages 664-94, April.
- von Gaudecker, H.M. & van Soest, A.H.O. & Wengstrom, E., 2009. "Heterogeneity in Risky Choice Behavior in a Broad Population," Discussion Paper 2009-12, Tilburg University, Center for Economic Research.
- Gaudecker, Hans-Martin von & van Soest, Arthur & Wengström, Erik, 2009. "Heterogeneity in Risky Choice Behaviour in a Broad Population," IZA Discussion Papers 4022, Institute for the Study of Labor (IZA).
- Mohammed Abdellaoui & Han Bleichrodt & Olivier L'Haridon & Dennie Van Dolder, 2013. "Source-Dependence of Utility and Loss Aversion: A Critical Test of Ambiguity Models," Economics Working Paper Archive (University of Rennes 1 & University of Caen) 201330, Center for Research in Economics and Management (CREM), University of Rennes 1, University of Caen and CNRS.
- Guido Baltussen & G. Post & Martijn Assem & Peter Wakker, 2012. "Random incentive systems in a dynamic choice experiment," Experimental Economics, Springer, vol. 15(3), pages 418-443, September.
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