Cookies?
Library Header Image
LSE Research Online LSE Library Services

The impossibility of unbiased judgment aggregation

Dietrich, Franz and List, Christian (2007) The impossibility of unbiased judgment aggregation. . Department of Government, London School of Economics and Political Science, London, UK. (Submitted)

[img]
Preview
PDF
Download (269kB) | Preview

Abstract

Standard impossibility theorems on judgment aggregation over logically connected propositions either use a controversial systematicity condition or apply only to agen- das of propositions with rich logical connections. Are there any serious impossibilities without these restrictions? We prove an impossibility theorem without systematicity that applies to most standard agendas: Every judgment aggregation function (with rational inputs and outputs) satisfying a condition called unbiasedness is dictatorial (or e¤ectively dictatorial if we remove one of the agenda conditions). Our agenda conditions are tight. Applied illustratively to (strict) preference aggregation repres- ented in our model, the result implies that every unbiased social welfare function with universal domain is e¤ectively dictatorial.

Item Type: Monograph (Working Paper)
Official URL: http://personal.lse.ac.uk/list/default.htm
Additional Information: © 2007 Franz Dietrich and Christian List
Divisions: Government
Philosophy, Logic and Scientific Method
CPNSS
Subjects: B Philosophy. Psychology. Religion > BC Logic
Sets: Departments > Government
Departments > Philosophy, Logic and Scientific Method
Research centres and groups > Centre for Philosophy of Natural and Social Science (CPNSS)
Date Deposited: 29 Jul 2008 08:33
Last Modified: 31 Aug 2020 23:05
URI: http://eprints.lse.ac.uk/id/eprint/20067

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics