Rational Overoptimism (and Other Biases)
Rational agents with differing priors tend to be overoptimistic about their chances of success. In particular, an agent who tries to choose the action that is most likely to succeed, is more likely to choose an action of which he overestimated, rather than underestimated, the likelihood of success. After studying the comparative statics of this mechanism, I show that it also causes agents to attribute failure to exogenous factors but success to their own choice of action, to disproportionately believe that they will outperform others, to overestimate the precision of their estimates, and to overestimate their control over the outcome.
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Volume (Year): 94 (2004)
Issue (Month): 4 (September)
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References listed on IDEAS
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.:
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LSE Research Online Documents on Economics
24954, London School of Economics and Political Science, LSE Library.
- Brunnermeier, Markus K & Parker, Jonathan A, 2004. "Optimal Expectation," CEPR Discussion Papers 4656, C.E.P.R. Discussion Papers.
- Jonathan A. Parker & Markus K. Brunnermeier, 2004. "Optimal Expectations," Econometric Society 2004 North American Winter Meetings 426, Econometric Society.
- Markus K. Brunnermeier & Jonathan A. Parker, 2004. "Optimal Expectations," NBER Working Papers 10707, National Bureau of Economic Research, Inc.
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PIER Working Paper Archive
04-023, Penn Institute for Economic Research, Department of Economics, University of Pennsylvania, revised 01 May 2003.
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