Ranking by rating

Yves Sprumont ()

Cahiers de recherche from Universite de Montreal, Departement de sciences economiques

Abstract: Each item in a given collection is characterized by a set of possible performances. A (ranking) method is a function that assigns an ordering of the items to every performance profile. Ranking by Rating consists in evaluating each item’s performance by using an exogenous rating function, and ranking items according to their performance ratings. Any such method is separable: the ordering of two items does not depend on the performances of the remaining items. We prove that every separable method must be of the ranking-by-rating type if (i) the set of possible performances is the same for all items and the method is anonymous, or (ii) the set of performances of each item is ordered and the method is monotonic. When performances are m-dimensional vectors, a separable, continuous, anonymous, monotonic, and invariant method must rank items according to a weighted geometric mean of their performances along the m dimensions.

Keywords: Ranking methods; separability (search for similar items in EconPapers)
JEL-codes: D71 D89 (search for similar items in EconPapers)
Pages: 18 pages
Date: 2016
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http://hdl.handle.net/1866/13179 (application/pdf)

Related works:
Journal Article: Ranking by rating (2018)
Working Paper: Ranking by Rating (2016)
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Persistent link: https://EconPapers.repec.org/RePEc:mtl:montde:2016-03

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