Related Experiment Video
Updated: Jun 22, 2026

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods
Published on: September 19, 2012
Including risk in stated-preference economic valuations: Experiments on choices for marine recreation
Jeffrey Wielgus1, Leah R Gerber, Enric Sala
1School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA. jwielgus@wri.org
Abstract:
Stated-preference surveys for the economic valuation of environmental resources typically assume no uncertainty in the hypothetical valuation scenarios. However, the outcomes of environmental policies are uncertain. We explored the effects of including information on probabilities of attribute improvement and provision in choice experiments. Our results suggest that stating explicitly a high probability for the occurrence of the valuation scenario can improve the goodness of fit of choice models and the consistency of choices. As the general public becomes more aware of the uncertainty of environmental outcomes under global change, omitting information on scenario risk may contribute to hypothetical bias and impair the validity of stated-preference valuations.
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