Articles scientifiques

A Cognitive Model of Individual Well-Being

I. GILBOA, D. Schmeidler

Social Choice and Welfare

2000, vol. 12, pp.269-288

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)

An Experimental Study of Updating Ambiguous Beliefs

M. Cohen, I. GILBOA, J. Jaffray, D. Schmeidler

Risk, Decision, and Policy

2000, vol. 5, pp.123-133

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)

An improved version of a theorem concerning finite row-column exchangeable arrays

M. SCARSINI, D. Capello, B. Bassan

Commentationes Mathematicae Universitatis Carolinae

2000, vol. 41, pp.197-198

Départements : Economie et Sciences de la décision

Case-Based Knowledge and Induction

I. GILBOA, D. Schmeidler

IEEE Transactions on Systems, Man, and Cybernetics - A

2000, vol. 30, pp.85-95

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)

Does Optimization Imply Rationality?



2000, vol. 124, pp.73-111

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)

The relations between rationality and optimization have been widely discussed in the wake of Herbert Simon's work, with the common conclusion that the rationality concept does not imply the optimization principle. The paper is partly concerned with adding evidence for this view, but its main, more challenging objective is to question the converse implication from optimization to rationality, which is accepted even by bounded rationality theorists. We discuss three topics in succession: (1) rationally defensible cyclical choices, (2) the revealed preference theory of optimization, and (3) the infinite regress of optimization. We conclude that (1) and (2) provide evidence only for the weak thesis that rationality does not imply optimization. But (3) is seen to deliver a significant argument for the strong thesis that optimization does not imply rationality


Département Economie et Sciences de la Décision

Campus HEC Paris
1, rue de la Libération
78351 Jouy-en-Josas cedex


Tristan TOMALA

Economie - Sciences de la Décision (GREGHEC)

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