AbstractPsychological evidence suggests that people’s learning behavior is often prone to a “myside bias” or “irrational belief persistence” in contrast to learning behavior exclusively based on objective data. In the context of Bayesian learning such a bias may result in diverging posterior beliefs and attitude polarization even if agents receive identical information. Such patterns cannot be explained by the standard model of rational Bayesian learning that implies convergent beliefs. As our key contribution, we therefore develop formal models of Bayesian learning with psychological bias as alternatives to rational Bayesian learning. We derive condi- tions under which beliefs may diverge in the learning process and thus conform with the psychological evidence. Key to our approach is the assumption of ambiguous beliefs that are formalized as non-additive probability measures arising in Choquet expected utility theory. As a specific feature of our approach, our models of Bayesian learning with psychological bias reduce to rational Bayesian learning in the absence of ambiguity.
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Date of creation: 31 Dec 2007
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- NEP-ALL-2008-01-26 (All new papers)
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- NEP-GTH-2008-01-26 (Game Theory)
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- Alexander Zimper, 2007. "Half empty, half full and the possibility of agreeing to disagree," Working Papers 58, Economic Research Southern Africa.
- Viscusi, W. Kip, 1985. "A Bayesian perspective on biases in risk perception," Economics Letters, Elsevier, vol. 17(1-2), pages 59-62.
- Eichberger, J. & Kelsey, D., 1996.
"E-Capacities and the Ellsberg Paradox,"
96-13, Department of Economics, University of Birmingham.
- John Ameriks & Andrew Caplin & John Leahy, 2002.
"Wealth Accumulation and the Propensity to Plan,"
NBER Working Papers
8920, National Bureau of Economic Research, Inc.
- Tonks, Ian, 1981.
"Bayesian Learning and the Optimal Investment Decision of the Firm,"
The Warwick Economics Research Paper Series (TWERPS)
192, University of Warwick, Department of Economics.
- Tonks, Ian, 1983. "Bayesian Learning and the Optimal Investment Decision of the Firm," Economic Journal, Royal Economic Society, vol. 93(369a), pages 87-98, Supplemen.
- Fudenberg, Drew & Levine, David, 1995.
"Consistency and Cautious Fictitious Play,"
3198694, Harvard University Department of Economics.
- Sjostrom, T. & Krishna, V., 1995.
"On the Convergence of Ficticious Play,"
04-95-07, Pennsylvania State - Department of Economics.
- Vijay Krishna & Tomas Sjostrom, 1995. "On the Convergence of Fictitious Play," Harvard Institute of Economic Research Working Papers 1717, Harvard - Institute of Economic Research.
- Vijay Krishna & T. Sjostrom, 2010. "On the Convergence of Fictitious Play," Levine's Working Paper Archive 417, David K. Levine.
- Vijay Krishna & Tomas Sjostrom, 1995. "On the Convergence of Fictitious Play," Game Theory and Information 9503003, EconWPA.
- Neeman, Zvika, 1996. "Approximating Agreeing to Disagree Results with Commonp-Beliefs," Games and Economic Behavior, Elsevier, vol. 12(1), pages 162-164, January.
- Wakker, Peter P, 2001. "Testing and Characterizing Properties of Nonadditive Measures through Violations of the Sure-Thing Principle," Econometrica, Econometric Society, vol. 69(4), pages 1039-59, July.
- Paul Milgrom & Nancy L.Stokey, 1979.
"Information, Trade, and Common Knowledge,"
377R, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Morris, Stephen, 1994. "Trade with Heterogeneous Prior Beliefs and Asymmetric Information," Econometrica, Econometric Society, vol. 62(6), pages 1327-47, November.
- Fudenberg Drew & Kreps David M., 1993.
"Learning Mixed Equilibria,"
Games and Economic Behavior,
Elsevier, vol. 5(3), pages 320-367, July.
- Epstein, Larry G, 1999. "A Definition of Uncertainty Aversion," Review of Economic Studies, Wiley Blackwell, vol. 66(3), pages 579-608, July.
- Alexander Ludwig & Alexander Zimper, 2004.
"Investment Behavior under Ambiguity: The Case of Pessimistic Decision Makers,"
MEA discussion paper series
04060, Munich Center for the Economics of Aging (MEA) at the Max Planck Institute for Social Law and Social Policy.
- Ludwig, Alexander & Zimper, Alexander, 2006. "Investment behavior under ambiguity: The case of pessimistic decision makers," Mathematical Social Sciences, Elsevier, vol. 52(2), pages 111-130, September.
- Ludwig, Alexander & Zimper, Alexander, 2004. "Investment Behavior under Ambiguity: The Case of Pessimistic Decision Makers," Sonderforschungsbereich 504 Publications 04-31, Sonderforschungsbereich 504, Universität Mannheim & Sonderforschungsbereich 504, University of Mannheim.
- Ghirardato, Paolo & Marinacci, Massimo, 2002. "Ambiguity Made Precise: A Comparative Foundation," Journal of Economic Theory, Elsevier, vol. 102(2), pages 251-289, February.
- Abel, Andrew B., 2002.
"An exploration of the effects of pessimism and doubt on asset returns,"
Journal of Economic Dynamics and Control,
Elsevier, vol. 26(7-8), pages 1075-1092, July.
- Andrew B. Abel, 2001. "An Exploration of the Effects of Pessimism and Doubt on Asset Returns," NBER Working Papers 8132, National Bureau of Economic Research, Inc.
- Andrew B. Abel, 2001. "An exploration of the effects of pessimism and doubt on asset returns," Working Papers 01-1, Federal Reserve Bank of Philadelphia.
- David Schmeidler, 1989.
"Subjective Probability and Expected Utility without Additivity,"
Levine's Working Paper Archive
7662, David K. Levine.
- Schmeidler, David, 1989. "Subjective Probability and Expected Utility without Additivity," Econometrica, Econometric Society, vol. 57(3), pages 571-87, May.
- Itzhak Gilboa & David Schmeidler, 1991.
"Updating Ambiguous Beliefs,"
924, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Viscusi, W Kip & O'Connor, Charles J, 1984. "Adaptive Responses to Chemical Labeling: Are Workers Bayesian Decision Makers?," American Economic Review, American Economic Association, vol. 74(5), pages 942-56, December.
- Siniscalchi, Marciano, 2011.
"Dynamic choice under ambiguity,"
Econometric Society, vol. 6(3), September.
- Gilboa, Itzhak, 1987. "Expected utility with purely subjective non-additive probabilities," Journal of Mathematical Economics, Elsevier, vol. 16(1), pages 65-88, February.
- Marciano Siniscalchi, 2001. "Bayesian Updating for General Maxmin Expected Utility Preferences," Discussion Papers 1366, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Alexander Ludwig & Alexander Zimper, 2013. "Biased Bayesian learning with an application to the risk-free rate puzzle," Working Papers 201366, University of Pretoria, Department of Economics.
- Talk:Attitude polarization in Wikipedia (English)
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