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The ignorant observer

Thibault Gajdos () and Feriel Kandil ()

Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) from HAL

Abstract: We propose an extension of Harsanyi's Impartial Observer Theorem based on the representation of ignorance as the set of all possible probability distributions over individuals. We obtain a characterization of the observer's preferences that, under our most restrictive conditions, is a convex combination of Harsanyi's utilitarian and Rawls' egalitarian criteria. This representation is ethically meaningful, in the sense that individuals' utilities are cardinally measurable and fully comparable. This allows us to conclude that the impartiality requirement cannot be used to decide between Rawls' and Harsanyi's positions.

Keywords: Decision under ignorance; Impartiality; Justice; Utilitarianism; Egalitarianism; Decision under ignorance. (search for similar items in EconPapers)
Date: 2008-08
Note: View the original document on HAL open archive server: https://halshs.archives-ouvertes.fr/halshs-00177374
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Published in Social Choice and Welfare, Springer Verlag, 2008, 31 (2), pp.193-232. ⟨10.1007/s00355-007-0274-8⟩

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Journal Article: The ignorant observer (2008) Downloads
Working Paper: The Ignorant Observer (2006) Downloads
Working Paper: The ignorant observer (2006) Downloads
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Persistent link: https://EconPapers.repec.org/RePEc:hal:cesptp:halshs-00177374

DOI: 10.1007/s00355-007-0274-8

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