Heller, Yuval (2011): Overconfidence and diversification.
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Experimental evidence suggests that people tend to be overconfident in the sense that they overestimate the accuracy of their own predictions. In this paper we present a principal-agent model in which principal's interest in diversification motivates him to hire overconfident agents. We show that the induced overconfidence satisfies experimental stylized facts. In addition, we show that overconfidence is a unique evolutionarily stable strategy, and that it can Pareto-improve social welfare. Finally, we demonstrate applicability by demonstrating why CEOs hire overconfident intermediate managers, and why investors prefer overconfident entrepreneurs.
|Item Type:||MPRA Paper|
|Original Title:||Overconfidence and diversification|
|Keywords:||overconfidence, diversification, hard-easy effect, evolutionary stability|
|Subjects:||C - Mathematical and Quantitative Methods > C7 - Game Theory and Bargaining Theory > C72 - Noncooperative Games
C - Mathematical and Quantitative Methods > C7 - Game Theory and Bargaining Theory > C73 - Stochastic and Dynamic Games ; Evolutionary Games ; Repeated Games
|Depositing User:||Yuval Heller|
|Date Deposited:||30. Sep 2011 16:49|
|Last Modified:||19. Feb 2013 18:23|
Alicke Mark D., Olesya Govorun. 2005. “The better-than-average effect”. In: The self in social judgment, ed. Mark D. Alicke, David A. Dunning, and Justin I. Krueger, New York: Psychology Press.
Bénabou, Roland, and Jean Tirole. 2002. “Self-confidence and personal motivation” Quarterly Journal of Economics, 117(3): 871-915.
Benoit, Jean P. and Juan Dubra. 2009. “Overconfidence?” Unpublished manuscript. http://ssrn.com/abstract=1088746
Blume, Lawrence, and David Easley. 1992. “Evolution and Market Behavior” Journal of Economic Theory, 58, 9-40.
Bernardo, Antonio E., and Ido Welch. 2001. “On the evolution of overconfidence and entrepreneurs” Journal of Economics & Management Strategy, 10(3), 301-330.
Brenner, Lyle, DAle Griffin, Derek J. Koehler. “Modeling patterns of probability calibration with random support theory: diagnosing case-based judgment” Organizational Behavior and Human Decision Processes, 97: 64-81.
Brenner, Lyle A., Derek J. Kohler, Varda Liberman, and Amos Tversky. 1996. “Overconfidence in probability and frequency Judgments: a critical examination” Organizational Behavior and Human Decision Processes, 65(3): 212-219.
Budescu, David V., Ning Du. 2007. “Coherence and consistency of investors' probability judgments” Management Science, 53(11): 1731-1744.
Budescu, David V., Thomas Wallsten, and Wing Tung Au. “On the importance of random error in the study of probability judgment. Part II: applying the stochastic judgment model to detect systematic trends” Journal of Behavioral Decision Making, 10: 173-188.
Chuang, Wen-I, and Bong-Soo Lee. 2006. “An empirical evaluation of the overconfidence hypothesis” Journal of Banking and Finance 30, 2489-2515.
Compte, Oliver, and Andrew Performance. “Confidence-Enhanced Performance” The American Economic Review, 94(5), 1536-1557.
Cooper, Arnold C., Carolyn Y. Woo, and William C. Dunkelberg. 1988. “Entrepreneurs' perceived chances for success” Journal of Business Venturing 3, 97-108.
Erev, Ido, Thomas S. Wallsten, David V. Budescu. “Simultaneous over and underconfidence: the role of error in judgment processes” Psychological Review, 101(3): 519-527.
Fischhoff, Baruch, Paul Slovic, and Sarah Lichtenstein. 1977. “Knowing with certainty: the appropriateness of extreme confidence” Journal of Experimental Psychology: Human Perception and Performance, 3(4): 552-564.
Busenitz, Lowel W., Jay B. Barney. 1997. “Differences between entrepreneurs and managers in large organizations: biases and heuristics in strategic decision-making” Journal of Business Venturing, 12: 9-30.
Gervais, Simon, J.B. Heaton, Terrance Odean. “Overconfidence, investment policy, and manager welfare”. http://apps.olin.wustl.edu/FIRS/pdf/MemberPapers/21/1.pdf
Gervais, Simon, Terrance Odean. “Learning to be overconfident” The Review of Financial Studies, 14(1): 1-27.
Gigerenzer, Gerd, Ulrich Hoffrage, and Hienz Kleinbolting. 1991. “Probabilistic mental models: a Brunswikian theory of confidence” Psychological Review, 98(4): 506-528.
Glaser, Markus, Thomas Langer, and Martin Weber. “Overconfidence of professionals and lay people: individual differences within and between tasks?” unpublished manuscript. http://ssrn.com/abstract=712583
Goel, Anand M, Anjan V. Thakor. “Overconfidence, CEO selection and Corporate Governance” The Journal of Finance, LXIII(6): 2737-2783.
Griffin, Dale, and Lyle Brenner. 2004. “Perspectives on probability judgment calibration” In: Blackwell Handbook of Judgment and Decision Making, ed. Derek J. Koehler and Nigel Harvey, 177–99, Boston: Blackwell Publishing.
Griffin, Dale, and Amos Tversky. 1992. “The weighing of evidence and the determinants of confidence” Cognitive Psychology, 24: 411-435.
Grub, Michael D. 2009. “Selling to overconfident consumers” American Economic Review, 99(5): 1770-1807.
Henrion, Max, and Baruch Fischhoff. 2002. “Assessing uncertainty in physical constants.” In: Heuristics and Biases: The Psychology of Intuitive Judgment, ed. T. Gilovich, Dale Griffin and Daniel Kahneman, 666-677, Cambridge: Cambridge University Press.
Howell, William C., and Sarah A. Burnett. 1978. “Uncertainty measurement: a cognitive taxonomy” Organizational Behavior and Human Performance 22, 45-68.
Kahneman, Daniel and Amos Tversky. 1982. “Variants of Uncertainty” Cognition, 11: 143-157.
Keren, Gideon. 1987. “Facing uncertainty in the game of Bridge: a calibration study” Organizational Behavior and Human Decision Processes, 39: 98-114.
Klayman, Joshua, Jack B. Soll, Claudia Gonzlez-Vallejo, and Sema Barlas. 1999. “Overconfidence: it depends on how, want and whom you ask” Organizational Behavior and Human Decision Processes, 79(3): 216-247.
Koehler, Derek J., Lyle Brenner, and Dale Griffin. 2002. “The calibration of expert judgment: Heuristics and biases beyond the laboratory. In: Heuristics and Biases: The Psychology of Intuitive Judgment, ed. T. Gilovich, Dale Griffin and Daniel Kahneman, 686-715, Cambridge: Cambridge University Press.
Köszegi, Botond. 2006. “Ego utility, overconfidence and task choice.” Journal of European Economic Association, 4(4): 673-707.
Lewontin Richard C., and D. Cohen. 1969. “On population growth in a randomly varying environment.” Proceedings of the National Academy of Sciences of USA, 62: 1056-60.
Lichtenstein, Sarah, Baruch Fischhoff, and Lawrence D. Phillips, 1982. “Calibration of probabilities: the state of the art to 1980.” In Judgment Under Uncertainty: Heuristics and Biases, ed. Daniel Kahneman, Paul Slovic, and Amos Tversky, Cambridge: Cambridge University Press.
Mcnamara, John M. 1995. “Implicit frequency dependence and kin selection in fluctuating environments” Evolutionary Ecology, 9: 185-203.
Moore. Don A. 2007. “Not so above average after all: when people believe they are worse than average and its implications for theories of bias in social comparison” Organizational Behavior and Human Decision Processes, 102: 42-58.
Moore, Don A., and Paul J. Healy. 2008. “The trouble with overconfidence” Psychological Review 2008, 115 (2): 502-517.
von Neumann, John, and Oscar Morgenstern. 1944 (third edition, 1953). Theory of Games and Economic Behavior, Princeton: Princeton University Press.
Novemsky, Nathan, and Shirit Kronzon.1999. “How are base-rates uses, when they are used: a comparison of additive and Bayesian models of base-rate use” Journal of Behavioral Decision Making, 12: 55-69.
Odean, Terrance. 1998. “Volume, volatility, price, and profit when all traders are above average.” The Journal of Finance, LIII(7): 1887-1934.
Oskamp, Stuart. 1965. “Overconfidence in case-study judgments” Journal of Cognitive Psychology, 29(3), 261-265.
Robson Arthur J. 1996. “A biological basis for expected and non-expected utility” Journal of economic Theory, 68: 397-424.
Russo, Edward J., Paul J.H. Schoemaker. 1992. “Managing overconfidence” Sloan Management Rev. 33: 7-17.
Sandroni, Alvaro, and Francesco Squintani. 2007. “Overconfidence, insurance and paternalism” The American Economic Review, 97(5), 1994-2004.
Sieber, Joan E. 1974. “Effects of decision importance on ability to generate warranted subjective uncertainty” Journal of Personality and Social Psychology, 30(5): 688-694.
Skata, Dorota. 2008. “Overconfidence in psychology and finance - an interdisciplinary literature review” Bank i Kredy, 4: 33-50.
Soll, Jack B. 1996. “Determinants of Overconfidence and Miscalibration: The Roles of Random Error and Ecological Structure” Organizational Behavior and Human Decision Processes, 65(2): 117-137.
Soll, Jack B., Joshua Klayman. 2004. “Overconfidence in interval estimates” Journal of Experimental Psychology: Learning, Memory and Cognition, 30(2), 299-314.
Svenson, Ola. 1981. “Are we all less risky and more skillful than our fellow drivers?” Acta Psychological 47, 143-148.
Taylor, Shelley E., Jonathan D. Brown. 1988. “Illusion and well-being: a social psychological perspective on mental health” Psychological Bulletin, 103(2), 193-210.
Teigen, Karl H., and Magne Jorgensen. 2005. “When 90% confidence intervals are 50% certain: on the credibility of credible intervals” Applied cognitive Psychology, 19: 455-475.
Van Den Steen, Eric. 2004. “Rational overoptimism (and other biases)” American Economic Review, 94(4): 1141-1151.
Wang, F. Albert. 2001. “Overconfidence, investor sentiment, and evolution.” Journal of Financial Intermediation 10, 138-170.
Weinberg, Bruce A. 2009. “A model of overconfidence” Pacific Economic Review, 14(4): 502-515.
Yates, J. Frank, Ju-Whei Lee, Winston R. Sieck, Incheol Choi, and Paul C. Price. 2002. “Probability judgment across cultures.” In: Heuristics and Biases: The Psychology of Intuitive Judgment, ed. T. Gilovich, Dale Griffin and Daniel Kahneman, 271-291, Cambridge: Cambridge University Press.
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Overconfidence and risk dispersion. (deposited 18. Oct 2010 15:18)
Overconfidence and diversification. (deposited 02. Nov 2010 12:24)
Overconfidence and diversification. (deposited 21. Dec 2010 13:18)
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- Overconfidence and diversification. (deposited 21. Dec 2010 13:18)
- Overconfidence and diversification. (deposited 02. Nov 2010 12:24)