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 naÂ¨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 dÃ©cideur rationnel est-il censÃ© rÃ©agir face Ã un problÃ¨me 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 Ã utiliser une forme de la thÃ©orie de l'utilitÃ© espÃ©rÃ©e et de prÃ©sumer que les agents attribuent leurs propres probabilitÃ©s subjectives Ã chaque Ã©lÃ©ment de la reprÃ©sentation d'Ã©tat (sans doute connue). Par contraste, notre article prÃ©sente un modÃ¨le oÃ¹ les agents ne forment pas de probabilitÃ©s subjectives sur les Ã©lÃ©ments de la reprÃ©sentation d'Ã©tat, mais utilisent de nouveaux renseignements afin de mettre Ã jour leurs croyances sur les Ã©lÃ©ments formant la reprÃ©sentation d'Ã©tat. Le comportement des Ã©changes avec ce modÃ¨le dans un marchÃ© d'actifs simple et incertain nous mÃ¨ne Ã des prÃ©dictio
(This abstract was borrowed from another version of this item.)
Volume (Year): 48 (2011)
Issue (Month): 2 (October)
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- Gilboa, Itzhak & Schmeidler, David, 1989. "Maxmin expected utility with non-unique prior," Journal of Mathematical Economics, Elsevier, vol. 18(2), pages 141-153, April.
- Mark Machina, 2004. "Almost-objective uncertainty," Economic Theory, Springer, vol. 24(1), pages 1-54, 07.
- Han Ozsoylev & Jan Werner, 2011. "Liquidity and asset prices in rational expectations equilibrium with ambiguous information," Economic Theory, Springer, vol. 48(2), pages 469-491, October.
- Jayant V Ganguli & Scott Condie, 2008.
"Ambiguity and rational expectations equilibria,"
2008 Meeting Papers
719, Society for Economic Dynamics.
- Eddie Dekel & Barton L. Lipman & Aldo Rustichini, 1998. "Standard State-Space Models Preclude Unawareness," Econometrica, Econometric Society, vol. 66(1), pages 159-174, January.
- 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.
- Chen, Kay-Yut & Plott, Charles R., . "Nonlinear Behavior in Sealed Bid First Price Auctions," Working Papers 774, California Institute of Technology, Division of the Humanities and Social Sciences.
- Luciano Castro & Marialaura Pesce & Nicholas Yannelis, 2011.
"Core and equilibria under ambiguity,"
Springer, vol. 48(2), pages 519-548, October.
- Scott Condie & Jayant Ganguli, 2011. "Informational efficiency with ambiguous information," Economic Theory, Springer, vol. 48(2), pages 229-242, October.
- 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.
- 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.
- Luca Rigotti & Chris Shannon=20, 2002. "Uncertainty and Risk in Financial Markets," Game Theory and Information 0201001, EconWPA.
- Marialaura Pesce & Peter Cramton & Nicholas C. Yannelis, 2010.
"A new perspective to rational expectations: maximin rational expectations equilibrium,"
1528, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- 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.
- 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.
- GlennW. Harrison & JohnA. List, 2008. "Naturally Occurring Markets and Exogenous Laboratory Experiments: A Case Study of the Winner's Curse," Economic Journal, 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.
- Jack Stecher & Timothy Shields & John Dickhaut (deceased), 2011.
"Generating Ambiguity in the Laboratory,"
INFORMS, vol. 57(4), pages 705-712, April.
- Larry G. Epstein & Martin Schneider, 2008.
"Ambiguity, Information Quality, and Asset Pricing,"
Journal of Finance,
American Finance Association, vol. 63(1), pages 197-228, 02.
- Larry Epstein & Martin Schneider, 2005. "Ambiguity, Information Quality and Asset Pricing," RCER Working Papers 519, University of Rochester - Center for Economic Research (RCER).
- Larry Epstein & Martin Schneider, 2004. "Ambiguity, Information Quality and Asset Pricing," RCER Working Papers 507, University of Rochester - Center for Economic Research (RCER).
- John Quiggin, 2007. "Ambiguity and the Value of Information: An Almost-objective Events Analysis," Economic Theory, Springer, vol. 30(3), pages 409-414, March.
- repec:feb:framed:0030 is not listed on IDEAS
- David Ahn & Syngjoo Choi & Douglas Gale & Shachar Kariv, 2014.
"Estimating ambiguity aversion in a portfolio choice experiment,"
Econometric Society, vol. 5, pages 195-223, 07.
- 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.
- 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.
- Harsanyi, John C, 1995.
"Games with Incomplete Information,"
American Economic Review,
American Economic Association, vol. 85(3), pages 291-303, June.
- Bryan Routledge & Stanley Zin, .
"Model Uncertainty and Liquidity,"
GSIA Working Papers
2001-E17, Carnegie Mellon University, Tepper School of Business.
- 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 Uncertainty and Liquidity," Econometric Society World Congress 2000 Contributed Papers 1617, Econometric Society.
- Bryan R. Routledge, Stanley E. Zin, 2000. "Model Uncertainity And Liquidity," Computing in Economics and Finance 2000 368, Society for Computational Economics.
- David Easley & Aldo Rustichini, 1999. "Choice without Beliefs," Econometrica, Econometric Society, vol. 67(5), pages 1157-1184, September.
- Shin Hyun Song, 1993. "Logical Structure of Common Knowledge," Journal of Economic Theory, Elsevier, vol. 60(1), pages 1-13, June.
- Urs Fischbacher, 2007. "z-Tree: Zurich toolbox for ready-made economic experiments," Experimental Economics, Springer, vol. 10(2), pages 171-178, June.
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