Group Deliberation and the Transformation of Judgments: An Impossibility Result

40 Pages Posted: 11 Jul 2008

See all articles by Christian List

Christian List

LMU Munich; London School of Economics

Multiple version iconThere are 2 versions of this paper

Date Written: March 2007

Abstract

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 condition 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 significance of these findings for democratic theory.

JEL Classification: D70, D71

Suggested Citation

List, Christian, Group Deliberation and the Transformation of Judgments: An Impossibility Result (March 2007). LSE STICERD Research Paper No. PEPP26, Available at SSRN: https://ssrn.com/abstract=1158348

Christian List (Contact Author)

LMU Munich ( email )

Munich
Germany

London School of Economics ( email )

London
United Kingdom

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