Rational ignoring with unbounded cognitive capacity
In canonical decision problems with standard assumptions, we demonstrate that inversely related payoffs and probabilities can produce expected-payoff-maximizing decisions that are independent of payoff-relevant information. This phenomenon of rational ignoring, where expected-payoff maximizers ignore costless and genuinely predictive information, arises because the conditioning effects of such signals disappear on average (i.e., under the expectations operator) even though they exert non-trivial effects on payoffs and probabilities considered in isolation (i.e., before integrating). Thus, rational ignoring requires no decision costs, cognitive constraints, or other forms of bounded rationality. This implies that simple decision rules relying on small subsets of the available information can, depending on the environment in which they are used, achieve high payoffs. Ignoring information is therefore rationalizable solely as a consequence of the shape of the stochastic payoff distribution.
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- Philippe Aghion & Patrick Bolton & Christopher Harris & Bruno Jullien, 1991.
"Optimal Learning by Experimentation,"
Review of Economic Studies,
Oxford University Press, vol. 58(4), pages 621-654.
- Aghion, P. & Bolton, P. & Harris, C. & Jullien, B., 1990. "Optimal Learning By Experimentation," DELTA Working Papers 90-10, DELTA (Ecole normale supérieure).
- Aghion Philippe & Bolton, Patrick & Harris Christopher & Jullien Bruno, 1991. "Optimal learning by experimentation," CEPREMAP Working Papers (Couverture Orange) 9104, CEPREMAP.
- James Dow, 1991. "Search Decisions with Limited Memory," Review of Economic Studies, Oxford University Press, vol. 58(1), pages 1-14.
- Rodepeter, Ralf & Winter, Joachim, 1999. "Rules of thumb in life-cycle savings models," Sonderforschungsbereich 504 Publications 99-81, Sonderforschungsbereich 504, Universität Mannheim;Sonderforschungsbereich 504, University of Mannheim.
- Ralf Rodepeter & Joachim K. Winter, 2000. "Rules of Thumb in Life-Cycle Savings Models," Econometric Society World Congress 2000 Contributed Papers 1222, Econometric Society.
- Rodepeter, Ralf & Winter, Joachim, 1999. "Rules of thumb in life-cycle savings models," Papers 99-81, Sonderforschungsbreich 504.
- David H. Cutler & James M. Poterba & Lawrence H. Summers, 1988. "What Moves Stock Prices?," Working papers 487, Massachusetts Institute of Technology (MIT), Department of Economics.
- David M. Cutler & James M. Poterba & Lawrence H. Summers, 1988. "What Moves Stock Prices?," NBER Working Papers 2538, National Bureau of Economic Research, Inc.
- Juan D. Carrillo & Thomas Mariotti, 2000. "Strategic Ignorance as a Self-Disciplining Device," Review of Economic Studies, Oxford University Press, vol. 67(3), pages 529-544.
- Vernon L. Smith, 2003. "Constructivist and Ecological Rationality in Economics," American Economic Review, American Economic Association, vol. 93(3), pages 465-508, June.
- Smith, Vernon L., 2002. "Constructivist and Ecological Rationality in Economics," Nobel Prize in Economics documents 2002-7, Nobel Prize Committee.
- John Conlisk, 1996. "Why Bounded Rationality?," Journal of Economic Literature, American Economic Association, vol. 34(2), pages 669-700, June.
- Robin Hogarth & Natalia Karelaia, 2005. "Regions of rationality: Maps for bounded agents," Economics Working Papers 828, Department of Economics and Business, Universitat Pompeu Fabra, revised Mar 2006.
- Garbacz, Christopher, 1990. "Estimating seat belt effectiveness with seat belt usage data from the Centers for Disease Control," Economics Letters, Elsevier, vol. 34(1), pages 83-88, September.
- Laura Martignon & Ulrich Hoffrage, 2002. "Fast, frugal, and fit: Simple heuristics for paired comparison," Theory and Decision, Springer, vol. 52(1), pages 29-71, February.
- Sendhil Mullainathan, 2002. "A Memory-Based Model of Bounded Rationality," The Quarterly Journal of Economics, Oxford University Press, vol. 117(3), pages 735-774. Full references (including those not matched with items on IDEAS)