Which worlds are possible? A judgment aggregation problem

Journal of Philosophical Logic 37 (1):57 - 65 (2008)

Authors
Christian List
London School of Economics
Abstract
Suppose the members of a group (e.g., committee, jury, expert panel) each form a judgment on which worlds in a given set are possible, subject to the constraint that at least one world is possible but not all are. The group seeks to aggregate these individual judgments into a collective judgment, subject to the same constraint. I show that no judgment aggregation rule can solve this problem in accordance with three conditions: “unanimity,” “independence” and “non-dictatorship,” Although the result is a variant of an existing theorem on “group identification” (Kasher and Rubinstein, Logique et Analyse 160:385–395, 1997), the aggregation of judgments on which worlds are possible (or permissible, desirable, etc.) appears not to have been studied yet. The result challenges us to take a stance on which of its conditions to relax.
Keywords judgment aggregation  possible worlds  propositions
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DOI 10.1007/s10992-007-9058-y
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References found in this work BETA

Arrow's Theorem in Judgment Aggregation.Franz Dietrich & Christian List - 2007 - Social Choice and Welfare 29 (1):19-33.
Social Choice and Individual Values.Kenneth J. Arrow - 1952 - Science and Society 16 (2):181-181.
Logical Constraints on Judgement Aggregation.Marc Pauly & Martin van Hees - 2006 - Journal of Philosophical Logic 35 (6):569 - 585.

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Citations of this work BETA

Judgment Aggregation: A Survey.Christian List & Clemens Puppe - 2009 - In Christian List & Clemens Puppe (eds.), Handbook of Rational and Social Choice. Oxford University Press.
Structuring Logical Space.Alejandro Pérez Carballo - 2016 - Philosophy and Phenomenological Research 92 (2):460-491.

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