AbstractThis paper introduces a tractable, structural model of subjective beliefs. Since agents that plan for the future care about expected future utility flows, current felicity can be increased by believing that better outcomes are more likely. On the other hand, expectations that are biased towards optimism worsen decision making, leading to poorer realized outcomes on average. Optimal expectations balance these forces by maximizing the total well-being of an agent over time. We apply our framework of optimal expectations to three different economic settings. In a portfolio choice problem, agents overestimate the return of their investment and underdiversify. In general equilibrium, agents' prior beliefs are endogenously heterogeneous, leading to gambling. Second, in a consumption-saving problem with stochastic income, agents are both overconfident and overoptimistic, and consume more than implied by rational beliefs early in life. Third, in choosing when to undertake a single task with an uncertain cost, agents exhibit several features of procrastination, including regret, inter-temporal preference reversal, and a greater readiness to accept commitment.
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Bibliographic InfoPaper provided by Financial Markets Group in its series FMG Discussion Papers with number dp434.
Date of creation: Dec 2002
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Web page: http://www.lse.ac.uk/fmg/
Other versions of this item:
- 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.
- Brunnermeier, Markus K & Parker, Jonathan A, 2004. "Optimal Expectation," CEPR Discussion Papers 4656, C.E.P.R. Discussion Papers.
- D10 - Microeconomics - - Household Behavior - - - General
- D80 - Microeconomics - - Information, Knowledge, and Uncertainty - - - General
- E21 - Macroeconomics and Monetary Economics - - Macroeconomics: Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
- G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
- G12 - Financial Economics - - General Financial Markets - - - Asset Pricing
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- Roland Bénabou & Jean Tirole, 2002.
"Self-Confidence And Personal Motivation,"
The Quarterly Journal of Economics,
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- Bénabou, Roland & Tirole, Jean, 2002. "Self Confidence and Personal Motivation," Open Access publications from University of Toulouse 1 Capitole http://neeo.univ-tlse1.fr, University of Toulouse 1 Capitole.
- Caplin, Andrew & Leahy, John, 1997.
"Psychological Expected Utility Theory and Anticipatory Feelings,"
97-37, C.V. Starr Center for Applied Economics, New York University.
- Andrew Caplin & John Leahy, 2001. "Psychological Expected Utility Theory And Anticipatory Feelings," The Quarterly Journal of Economics, MIT Press, vol. 116(1), pages 55-79, February.
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- Robert B. Barsky & Miles S. Kimball & F. Thomas Juster & Matthew D. Shapiro, 1997. "Preference Parameters and Behavioral Heterogeneity: An Experimental Approach in the Health and Retirement Survey," NBER Working Papers 5213, National Bureau of Economic Research, Inc.
- Barsky, Robert B, et al, 1997. "Preference Parameters and Behavioral Heterogeneity: An Experimental Approach in the Health and Retirement Study," The Quarterly Journal of Economics, MIT Press, vol. 112(2), pages 537-79, May.
- Leeat Yariv, 2002. "I'll See It When I Believe It - A Simple Model of Cognitive Consistency," Cowles Foundation Discussion Papers 1352, Cowles Foundation for Research in Economics, Yale University.
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