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Preference for Flexibility and the Opportunities of Choice

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Abstract

A decision-maker exhibits preference for flexibility if he always prefers any set of alternatives to its subsets, even when two of them contain the same best element. Desire for flexibility can be explained as the consequence of the agent's uncertainty along a two-stage process, where he must first preselect a subset of alternatives from which to make a final choice later on. We investigate conditions on the rankings of subsets that are compatible with the following assumptions: (1) the agent is endowed with a VN-M utility function of alternatives, (2) the agent attaches a subjective probability to the survival of each subset of alternatives, and (3) the agent will make a best choice out of any set which becomes available, and ranks sets ex-ante in terms of the expected utility of the best choices within them. We first prove that any total ordering respecting set inclusion is rationalizable in these terms. This result is essentially the same obtained by Kreps (1979) under an alternative interpretation. We also show that we cannot learn anything about the underlying utilities of agents unless we impose further restrictions on the admissible distributions of survival probabilities. Then we investigate the additional consequences of assuming that the survival probabilities of individual alternatives are independently distributed. We prove that this reduces significantly the class of set rankings which can be rationalized and that then one can infer some of the characteristics of the agentís preferences. We offer a full characterization for the case of three alternatives. We also provide necessary conditions for rationalizability in the general case.

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Paper provided by Unitat de Fonaments de l'Anàlisi Econòmica (UAB) and Institut d'Anàlisi Econòmica (CSIC) in its series UFAE and IAE Working Papers with number 598.03.

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Length: 14
Date of creation: 01 Jan 2003
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Handle: RePEc:aub:autbar:598.03

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  1. Sen, Amartya, 1991. "Welfare, preference and freedom," Journal of Econometrics, Elsevier, vol. 50(1-2), pages 15-29, October.
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Cited by:
  1. Bleichrodt, Han & Quiggin, John, 2013. "Capabilities as menus: A non-welfarist basis for QALY evaluation," Journal of Health Economics, Elsevier, vol. 32(1), pages 128-137.
  2. Casari, Marco, 2006. "Pre-Commitment and Flexibility in a Time Decision Experiment," Purdue University Economics Working Papers 1183, Purdue University, Department of Economics.
  3. Matthew Ryan, 2014. "Belief functions and preference for flexibility," Economics Bulletin, AccessEcon, vol. 34(1), pages 581-588.
  4. Paola Manzini & Marco Mariotti, 2013. "Imperfect Attention and Menu Evaluation," Discussion Paper Series, Department of Economics 201319, Department of Economics, University of St. Andrews, revised 25 Mar 2014.

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