Ranking sets of objects: The task-performing model

Asier Estevan (), Esteban Induráin () and Sergio Sara ()
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Asier Estevan: Public University of Navarre. Pamplona, Spain
Esteban Induráin: Public University of Navarre. Pamplona, Spain
Sergio Sara: Public University of Navarre. Pamplona, Spain

Economics Bulletin, 2026, vol. 46, issue 3, 934 - 948

Abstract: In the framework of the study of ranking sets of objects from an individual ranking of elements, we analyze a very specific model of preference extensions from a finite set to the family of its non-empty subsets, known as the task-performing model. This model constitutes a often used tool when a firm wants to hire more than one person based on an individual ranking on the set of candidates. We characterize its intrinsic mathematical nature as a special kind of positive natural-valued outer measure. We discuss some aspects of its use in practice.

Keywords: Individual preferences; ranking sets of objects; models of preference extensions; outer measures (search for similar items in EconPapers)
JEL-codes: C6 D7 (search for similar items in EconPapers)
Date: 2026-09-30
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