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Priors and desires

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  • Mayraz, Guy

Abstract

This paper offers a simple but powerful model of wishful thinking, cognitive dissonance, and related biases. Choices maximize subjective expected utility, but beliefs depend on the decision maker's interests as well as on relevant information. Simplifying assumptions yield a representation in which the payoff in an event affects beliefs as if it were part of the evidence about its likelihood. A single parameter determines both the direction and weight of this `evidence', with positive values corresponding to optimism and negative values to pessimism. Changes to a person's interests amount to new `evidence', and can alter beliefs even in the absence of new information. The magnitude of the bias increases with the degree of uncertainty and the strength of the decision maker's interests. High stakes can reduce the bias indirectly by increasing incentives to acquire information, but are otherwise consistent with substantial bias. Exploring applications, I show that wishful thinking can lead investors to become progressively more exposed to risk, and that while improved policing unambiguously deters crime, increased punishment may have little or no deterrent value.

Suggested Citation

  • Mayraz, Guy, 2011. "Priors and desires," LSE Research Online Documents on Economics 121944, London School of Economics and Political Science, LSE Library.
  • Handle: RePEc:ehl:lserod:121944
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    File URL: http://eprints.lse.ac.uk/121944/
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    References listed on IDEAS

    as
    1. Luís Santos-Pinto, 2008. "Positive Self-image and Incentives in Organisations," Economic Journal, Royal Economic Society, vol. 118(531), pages 1315-1332, August.
    2. , & ,, 2008. "Consumer optimism and price discrimination," Theoretical Economics, Econometric Society, vol. 3(4), December.
    3. Malmendier, Ulrike & Tate, Geoffrey, 2008. "Who makes acquisitions? CEO overconfidence and the market's reaction," Journal of Financial Economics, Elsevier, vol. 89(1), pages 20-43, July.
    4. Michael Manove & A. Jorge Padilla, 1999. "Banking (Conservatively) with Optimists," RAND Journal of Economics, The RAND Corporation, vol. 30(2), pages 324-350, Summer.
    5. John D. Hey, 1984. "The Economics of Optimism and Pessimism," Kyklos, Wiley Blackwell, vol. 37(2), pages 181-205, May.
    6. Linda Babcock & George Loewenstein, 1997. "Explaining Bargaining Impasse: The Role of Self-Serving Biases," Journal of Economic Perspectives, American Economic Association, vol. 11(1), pages 109-126, Winter.
    7. de Meza, David & Southey, Clive, 1996. "The Borrower's Curse: Optimism, Finance and Entrepreneurship," Economic Journal, Royal Economic Society, vol. 106(435), pages 375-386, March.
    8. David Hirshleifer & Tyler Shumway, 2003. "Good Day Sunshine: Stock Returns and the Weather," Journal of Finance, American Finance Association, vol. 58(3), pages 1009-1032, June.
    9. Ebonya L. Washington, 2008. "Female Socialization: How Daughters Affect Their Legislator Fathers," American Economic Review, American Economic Association, vol. 98(1), pages 311-332, March.
    10. Botond Kőszegi & Matthew Rabin, 2006. "A Model of Reference-Dependent Preferences," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 121(4), pages 1133-1165.
    11. Saunders, Edward M, Jr, 1993. "Stock Prices and Wall Street Weather," American Economic Review, American Economic Association, vol. 83(5), pages 1337-1345, December.
    12. Andrew Caplin & John Leahy, 2001. "Psychological Expected Utility Theory and Anticipatory Feelings," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 116(1), pages 55-79.
    13. Roland Bénabou & Jean Tirole, 2005. "Self-Confidence and Personal Motivation," International Economic Association Series, in: Bina Agarwal & Alessandro Vercelli (ed.), Psychology, Rationality and Economic Behaviour, chapter 2, pages 19-57, Palgrave Macmillan.
    14. Olivier Compte & Andrew Postlewaite, 2004. "Confidence-Enhanced Performance," American Economic Review, American Economic Association, vol. 94(5), pages 1536-1557, December.
    15. Ebonya Washington & Sendhil Mullainathan, 2009. "Sticking with Your Vote: Cognitive Dissonance and Political Attitudes," American Economic Journal: Applied Economics, American Economic Association, vol. 1(1), pages 86-111, January.
    16. Juan Dubra, 2004. "Optimism and Overconfidence in Search," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 7(1), pages 198-218, January.
    17. David Dillenberger & Andrew Postlewaite & Kareen Rozen, 2017. "Optimism and Pessimism with Expected Utility," Journal of the European Economic Association, European Economic Association, vol. 15(5), pages 1158-1175.
    18. Juan D. Carrillo & Thomas Mariotti, 2000. "Strategic Ignorance as a Self-Disciplining Device," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 67(3), pages 529-544.
    19. Alex Edmans & Diego García & Øyvind Norli, 2007. "Sports Sentiment and Stock Returns," Journal of Finance, American Finance Association, vol. 62(4), pages 1967-1998, August.
    20. Augustin Landier & David Thesmar, 2009. "Financial Contracting with Optimistic Entrepreneurs," The Review of Financial Studies, Society for Financial Studies, vol. 22(1), pages 117-150, January.
    21. Linda Babcock & Xianghong Wang & George Loewenstein, 1996. "Choosing the Wrong Pond: Social Comparisons in Negotiations That Reflect a Self-Serving Bias," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 111(1), pages 1-19.
    22. Alvaro Sandroni & Francesco Squintani, 2007. "Overconfidence, Insurance, and Paternalism," American Economic Review, American Economic Association, vol. 97(5), pages 1994-2004, December.
    23. Young Park & Luís Santos-Pinto, 2010. "Overconfidence in tournaments: evidence from the field," Theory and Decision, Springer, vol. 69(1), pages 143-166, July.
    24. Dan Lovallo & Colin Camerer, 1999. "Overconfidence and Excess Entry: An Experimental Approach," American Economic Review, American Economic Association, vol. 89(1), pages 306-318, March.
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    More about this item

    Keywords

    wishful thinking; cognitive dissonance; reference-dependent beliefs; referencedependent preferences; wellbeing; Guy Mayraz;
    All these keywords.

    JEL classification:

    • D01 - Microeconomics - - General - - - Microeconomic Behavior: Underlying Principles
    • D80 - Microeconomics - - Information, Knowledge, and Uncertainty - - - General
    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations

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