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Group deliberation and the transformation of judgments: an impossibility result

List, Christian (2007) Group deliberation and the transformation of judgments: an impossibility result. PSPE working papers, 04-2007. Department of Government, London School of Economics and Political Science, London, UK.

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While a large social-choice-theoretic literature discusses the aggregation of individual judgments into collective ones, there is relatively little formal work on the transformation of individual judgments in group deliberation. I develop a model of judgment transformation and prove a baseline impossibility result: Any judgment transformation function satisfying some initially plausible conditions is the identity function, under which no opinion change occurs. I identify escape routes from this impossibility result and argue that successful group deliberation must be 'holistic': individuals cannot generally revise their judgments on a proposition based on judgments on that proposition alone but must take other propositions into account too. I discuss the signi…cance of these …ndings for democratic theory.

Item Type: Monograph (Working Paper)
Official URL:
Additional Information: © 2007 The Author
Library of Congress subject classification: J Political Science > JC Political theory
Sets: Departments > Government
Departments > Philosophy, Logic and Scientific Method
Research centres and groups > Centre for Philosophy of Natural and Social Science (CPNSS)
Research centres and groups > Political Science and Political Economy Group
Identification Number: 04-2007
Date Deposited: 11 Sep 2009 15:29

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