Decision making and trade without probabilities
What is a rational decision-maker supposed to do when facing an unfamiliar problem, where there is uncertainty but no basis for making probabilistic assessments? One answer is to use a form of expected utility theory, and assume that agents assign their own subjective probabilities to each element of the (presumably known) state space. In contrast, this paper presents a model in which agents do not form subjective probabilities over the elements of the state space, but nonetheless use new information to update their beliefs about what the elements of the state space are. This model is shown to lead to different predictions about trading behavior in a simple asset market under uncertainty. A controlled laboratory experiment tests the predictions of this model against those of expected utility theory and against the hypothesis that subjects act na¨ıvely and non-strategically. The results suggest that a lack of subjective probabilities does not imply irrational or unpredictable behavior, but instead allows individuals to use both what they know and knowledge of what they do not know in their decision making. Comment un décideur rationnel est-il censé réagir face à un problème qui ne lui est pas familier lorsqu'il existe une certaine incertitude, et en l'absence d'une base sur laquelle effectuer des estimations probabilistes? Une solution consiste à utiliser une forme de la théorie de l'utilité espérée et de présumer que les agents attribuent leurs propres probabilités subjectives à chaque élément de la représentation d'état (sans doute connue). Par contraste, notre article présente un modèle où les agents ne forment pas de probabilités subjectives sur les éléments de la représentation d'état, mais utilisent de nouveaux renseignements afin de mettre à jour leurs croyances sur les éléments formant la représentation d'état. Le comportement des échanges avec ce modèle dans un marché d'actifs simple et incertain nous mène à des prédictions différentes. En utilisant une expé
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Volume (Year): 48 (2011)
Issue (Month): 2 (October)
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Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Bryan R. Routledge & Stanley E. Zin, 2001.
"Model Uncertainty and Liquidity,"
NBER Working Papers
8683, National Bureau of Economic Research, Inc.
- Bryan R. Routledge, Stanley E. Zin, 2000. "Model Uncertainity And Liquidity," Computing in Economics and Finance 2000 368, Society for Computational Economics.
- Bryan Routledge & Stanley Zin, "undated". "Model Uncertainty and Liquidity," GSIA Working Papers 2001-E17, Carnegie Mellon University, Tepper School of Business.
- Bryan R. Routledge & Stanley E. Zin, 2000. "Model Uncertainty and Liquidity," Econometric Society World Congress 2000 Contributed Papers 1617, Econometric Society.
- Shin Hyun Song, 1993. "Logical Structure of Common Knowledge," Journal of Economic Theory, Elsevier, vol. 60(1), pages 1-13, June.
- Harsanyi, John C, 1995.
"Games with Incomplete Information,"
American Economic Review,
American Economic Association, vol. 85(3), pages 291-303, June.
- GlennW. Harrison & JohnA. List, 2008.
"Naturally Occurring Markets and Exogenous Laboratory Experiments: A Case Study of the Winner's Curse,"
Royal Economic Society, vol. 118(528), pages 822-843, 04.
- Glenn Harrison & John List, 2008. "Naturally occurring markets and exogenous laboratory experiments: A case study of the winner's curse," Framed Field Experiments 00266, The Field Experiments Website.
- Glenn W. Harrison & John A. List, 2007. "Naturally Occurring Markets and Exogenous Laboratory Experiments: A Case Study of the Winner's Curse," NBER Working Papers 13072, National Bureau of Economic Research, Inc.
- Itzhak Gilboa & David Schmeidler, 1989.
"Maxmin Expected Utility with Non-Unique Prior,"
- Rigotti, Luca & Shannon, Chris, 2001.
"Uncertainty and Risk in Financial Markets,"
Department of Economics, Working Paper Series
qt7pp7113z, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
- Rigotti, Luca & Shannon, Chris, 2001. "Uncertainty and Risk in Financial Markets," Department of Economics, Working Paper Series qt6m42r5rr, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
- Luca Rigotti & Chris Shannon=20, 2002. "Uncertainty and Risk in Financial Markets," Game Theory and Information 0201001, EconWPA.
- Jack Stecher & Timothy Shields & John Dickhaut (deceased), 2011.
"Generating Ambiguity in the Laboratory,"
INFORMS, vol. 57(4), pages 705-712, April.
- repec:feb:framed:0030 is not listed on IDEAS
- Urs Fischbacher, 2007. "z-Tree: Zurich toolbox for ready-made economic experiments," Experimental Economics, Springer;Economic Science Association, vol. 10(2), pages 171-178, June.
- Chen, Kay-Yut & Plott, Charles R., "undated".
"Nonlinear Behavior in Sealed Bid First Price Auctions,"
774, California Institute of Technology, Division of the Humanities and Social Sciences.
- Chen, Kay-Yut & Plott, Charles R., 1998. "Nonlinear Behavior in Sealed Bid First Price Auctions," Games and Economic Behavior, Elsevier, vol. 25(1), pages 34-78, October.
- Larry Epstein & Martin Schneider, 2005.
"Ambiguity, Information Quality and Asset Pricing,"
RCER Working Papers
519, University of Rochester - Center for Economic Research (RCER).
- Mark Machina, 2004. "Almost-objective uncertainty," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 24(1), pages 1-54, 07.
- John Quiggin, 2007. "Ambiguity and the Value of Information: An Almost-objective Events Analysis," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 30(3), pages 409-414, March.
- Han Ozsoylev & Jan Werner, 2011. "Liquidity and asset prices in rational expectations equilibrium with ambiguous information," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 48(2), pages 469-491, October.
- Scott Condie & Jayant V. Ganguli, 2011.
"Ambiguity and Rational Expectations Equilibria,"
Review of Economic Studies,
Oxford University Press, vol. 78(3), pages 821-845.
- Eddie Dekel & Barton L. Lipman & Aldo Rustichini, 1998. "Standard State-Space Models Preclude Unawareness," Econometrica, Econometric Society, vol. 66(1), pages 159-174, January.
- Luciano De Castro & Marialaura Pesce & Nicolas Yannelis, 2011.
"Core and Equilibria under ambiguity,"
1534, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- David Easley & Aldo Rustichini, 1999. "Choice without Beliefs," Econometrica, Econometric Society, vol. 67(5), pages 1157-1184, September.
- Luciano De Castro & Marialaura Pesce & Nicholas C. Yannelis, 2011.
"A new perspective to rational expectations: maximin rational expectations equilibrium,"
The School of Economics Discussion Paper Series
1107, Economics, The University of Manchester.
- Marialaura Pesce & Peter Cramton & Nicholas C. Yannelis, 2010. "A new perspective to rational expectations: maximin rational expectations equilibrium," Discussion Papers 1528, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- David Ahn & Syngjoo Choi & Douglas Gale & Shachar Kariv, 2008.
"Estimating Ambiguity Aversion in a Portfolio Choice Experiment,"
Levine's Working Paper Archive
122247000000001989, David K. Levine.
- David Ahn & Syngjoo Choi & Douglas Gale & Shachar Kariv, 2014. "Estimating ambiguity aversion in a portfolio choice experiment," Quantitative Economics, Econometric Society, vol. 5, pages 195-223, 07.
- Ahn, David & Choi, Syngjoo & Gale, Douglas & Kariv, Shachar, 2013. "Estimating Ambiguity Aversion in a Portfolio Choice Experiment," Working Papers 13-22, University of Pennsylvania, Wharton School, Weiss Center.
- Morris, Stephen, 1996. "The Logic of Belief and Belief Change: A Decision Theoretic Approach," Journal of Economic Theory, Elsevier, vol. 69(1), pages 1-23, April.
- Scott Condie & Jayant Ganguli, 2011. "Informational efficiency with ambiguous information," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 48(2), pages 229-242, October.
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