It is argued that if the population of options is a finite poset, diversity comparisons may be conveniently based on widths i.e. on the respective maximum numbers of pairwise incomparable options included in the relevant subposets. The width-ranking and the undominated width-ranking are introduced and characterized
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Vito Peragine & Antonio Romero-Medina, .
"On Preference, Freedom and Diversity,"
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0003, Dipartimento di Scienze Economiche - Università di Bari.
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Barbera, S. & Bossert, W. & Pattanaik, P.K., 2001.
"Ranking Sets of Objects,"
Cahiers de recherche
2001-02, Centre interuniversitaire de recherche en économie quantitative, CIREQ.
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BARBERA, Salvador & BOSSERT, Walter & PATTANAIK, Prasanta K., 2001.
"Ranking Sets of Objects,"
Cahiers de recherche
2001-02, Universite de Montreal, Departement de sciences economiques.
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BOSSERT, Walter & PATTANAIK, Prasanta K. & XU, Yongsheng, 2001.
"The Measurement of Diversity,"
Cahiers de recherche
2001-17, Universite de Montreal, Departement de sciences economiques.
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