School of Economics and Finance

No. 563: Uncovered Set Choice Rule

Michele Lombardi , Queen Mary, University of London

July 1, 2006

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I study necessary and sufficient conditions for a choice function to be rationalised in the following sense: there exists a complete asymmetric relation T (a tournament) such that for each feasible (finite) choice situation, the choice coincides with the uncovered set of T. This notion of rationality explains not only cyclical and context dependent choices observed in practice, but also provides testable restrictions on observable choice behavior.

J.E.L classification codes: D01

Keywords:Rationalizability, Uncovered set, Intransitive choice