Risk attitudes, randomization to treatment, and self-selection into experiments
Randomization to treatment is fundamental to statistical control in the design of experiments. However randomization implies some uncertainty about treatment condition, and individuals differ in their preferences towards taking on risk. Since human subjects often volunteer for experiments or are allowed to drop out of the experiment at any time if they want to, it is possible that the sample observed in an experiment might be biased because of the risk of randomization. On the other hand, the widespread use of a guaranteed show-up fee that is non-stochastic may generate sample selection biases of the opposite direction, encouraging more risk averse samples into experiments. We directly test these hypotheses that risk attitudes play a role in sample selection. Our results suggest that randomization bias does affect the overall level of risk aversion in the sample we observe, but that it does not affect the demographic mix of risk attitudes in the sample. We show that the common use of non-stochastic show-up fees can generate samples that are more risk averse than would otherwise have been observed.
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- Glenn W. Harrison & Morten I. Lau & Melonie B. Williams, 2001.
"Estimating Individual Discount Rates in Denmark: A Field Experiment,"
NCEE Working Paper Series
200102, National Center for Environmental Economics, U.S. Environmental Protection Agency, revised Nov 2001.
- Glenn W. Harrison & Morten I. Lau & Melonie B. Williams, 2002. "Estimating Individual Discount Rates in Denmark: A Field Experiment," American Economic Review, American Economic Association, vol. 92(5), pages 1606-1617, December.
- Elisabet Rutstrom & Glenn Harrison & Melonie Williams & Morten Lau, 2002. "Estimating individual discount rates in denmark: A field experiment," Artefactual Field Experiments 00062, The Field Experiments Website.
- Elisabet Rutstrom & Glenn Harrison & Morten Lau, 2004.
"Estimating risk attitudes in denmark: A field experiment,"
Artefactual Field Experiments
00059, The Field Experiments Website.
- Glenn W. Harrison & Morten I. Lau & E. Elisabet Rutström, 2007. "Estimating Risk Attitudes in Denmark: A Field Experiment," Scandinavian Journal of Economics, Wiley Blackwell, vol. 109(2), pages 341-368, 06.
- Palfrey, Thomas R. & Pevnitskaya, Svetlana, 2008.
"Endogenous entry and self-selection in private value auctions: An experimental study,"
Journal of Economic Behavior & Organization,
Elsevier, vol. 66(3-4), pages 731-747, June.
- Palfrey, Thomas R. & Pevnitskaya, Svetlana, 2003. "Endogenous Entry and Self-selection in Private Value Auctions: An Experimental Study," Working Papers 1172, California Institute of Technology, Division of the Humanities and Social Sciences.
- Mitali Das & Whitney K. Newey & Francis Vella, 2003.
"Nonparametric Estimation of Sample Selection Models,"
Review of Economic Studies,
Wiley Blackwell, vol. 70(1), pages 33-58, January.
- Mitali Das & Whitney K. Newey & Francis Vella, 2003. "Nonparametric Estimation of Sample Selection Models," Review of Economic Studies, Oxford University Press, vol. 70(1), pages 33-58.
- Heckman, James, 2013.
"Sample selection bias as a specification error,"
Publishing House "SINERGIA PRESS", vol. 31(3), pages 129-137.
- Glenn W. Harrison & Eric Johnson & Melayne M. McInnes & E. Elisabet Rutström, 2005. "Temporal stability of estimates of risk aversion," Applied Financial Economics Letters, Taylor and Francis Journals, vol. 1(1), pages 31-35, January.
- Steffen Andersen & Glenn W. Harrison & Morten I. Lau & E. Elisabet Rutström, 2008. "Eliciting Risk and Time Preferences," Econometrica, Econometric Society, vol. 76(3), pages 583-618, 05.
- Glenn Harrison & John List, 2004.
Artefactual Field Experiments
00058, The Field Experiments Website.
- Francis Vella, 1998. "Estimating Models with Sample Selection Bias: A Survey," Journal of Human Resources, University of Wisconsin Press, vol. 33(1), pages 127-169.
- James J. Heckman, 1976. "The Common Structure of Statistical Models of Truncation, Sample Selection and Limited Dependent Variables and a Simple Estimator for Such Models," NBER Chapters, in: Annals of Economic and Social Measurement, Volume 5, number 4, pages 475-492 National Bureau of Economic Research, Inc.
- Dan Lovallo & Colin Camerer, 1999. "Overconfidence and Excess Entry: An Experimental Approach," American Economic Review, American Economic Association, vol. 89(1), pages 306-318, March.
- Steffen Andersen & Glenn W. Harrison & Morten I. Lau & E. Elisabet Rutström, 2008. "Lost In State Space: Are Preferences Stable?," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 49(3), pages 1091-1112, 08.
- Elisabet Rutstrom & Glenn Harrison & Melonie Williams & Morten Lau, 2005. "Eliciting risk and time preferences using field experiments: Some methodological issues," Artefactual Field Experiments 00063, The Field Experiments Website.
- James J. Heckman & Jeffrey A. Smith, 1995. "Assessing the Case for Social Experiments," Journal of Economic Perspectives, American Economic Association, vol. 9(2), pages 85-110, Spring.
- Charles A. Holt & Susan K. Laury, 2002. "Risk Aversion and Incentive Effects," American Economic Review, American Economic Association, vol. 92(5), pages 1644-1655, December.
- Heckman, James J. & Robb, Richard Jr., 1985. "Alternative methods for evaluating the impact of interventions : An overview," Journal of Econometrics, Elsevier, vol. 30(1-2), pages 239-267.
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