Library Header Image
LSE Research Online LSE Library Services

Which worlds are possible?: a judgment aggregation problem

List, Christian (2008) Which worlds are possible?: a judgment aggregation problem. Journal of Philosophical Logic, 37 (1). pp. 57-65. ISSN 0022-3611

Download (179Kb) | Preview


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.

Item Type: Article
Official URL:
Additional Information: © 2008 Springer
Library of Congress subject classification: H Social Sciences > H Social Sciences (General)
Sets: Departments > Government
Departments > Philosophy, Logic and Scientific Method
Research centres and groups > Centre for Philosophy of Natural and Social Science (CPNSS)
Date Deposited: 20 Jun 2008 11:50

Actions (login required)

Record administration - authorised staff only Record administration - authorised staff only


Downloads per month over past year

View more statistics