Diversity as width

Marcello Basili and Stefano Vannucci

Social Choice and Welfare, 2013, vol. 40, issue 3, 913-936

Abstract: It is argued that if a finite partially ordered population is given, and incomparability is taken as the relevant type of dissimilarity, then diversity comparisons between subpopulations may be conveniently based on widths namely on the maximum number of pairwise incomparable units they include. We introduce two width-based rankings. The first one is the plain width-ranking of subposets as induced by width computation. The second one is the undominated width-ranking of subposets namely the ranking induced by the sizes of undominated subposets. Simple axiomatic characterizations of the foregoing rankings are provided. Copyright Springer-Verlag 2013

Date: 2013
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DOI: 10.1007/s00355-011-0649-8

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