We analyze collective choice procedures with respect to their rationalizability by means of profiles of individual preference orderings. A selection function is a generalization of a choice function where selected alternatives may depend on a reference (or status quo) alternative in addition to the set of feasible options. Given the number of agents n, a selection function satisfies efficient and non-deteriorating n-rationalizability if there exists a profile of n orderings on the universal set of alternatives such that the selected alternatives are (i) efficient for that profile, and (ii) at least as good as the reference option according to each individual preference. We analyze efficient and non-deteriorating collective choice in a general abstract framework and provide a characterization result given a universal set domain.
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Paper provided by Centre interuniversitaire de recherche en économie quantitative, CIREQ in its series Cahiers de recherche with number
10-2002.
References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
Bossert, W. & Sprumont, Y., 2001.
"Non-Deteriorating Choice,"
Cahiers de recherche
2001-01, Centre interuniversitaire de recherche en économie quantitative, CIREQ.
Other versions:
Walter Bossert & Yves Sprumont, 2009.
"Non-Deteriorating Choice,"
Economica,
London School of Economics and Political Science, vol. 76(302), pages 337-363, 04.
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