Group deliberation and the transformation ofjudgments: an impossibility result

Christian List

STICERD - Political Economy and Public Policy Paper Series from Suntory and Toyota International Centres for Economics and Related Disciplines, LSE

Abstract: While a large social-choice-theoretic literature discusses the aggregation ofindividual judgments into collective ones, there is relatively little formalwork on the transformation of individual judgments in group deliberation. Idevelop a model of judgment transformation and prove a baselineimpossibility result: Any judgment transformation function satisfying someinitially plausible condition is the identity function, under which no opinionchange occurs. I identify escape routes from this impossibility result andargue that successful group deliberation must be 'holistic': individualscannot generally revise their judgments on a proposition based on judgmentson that proposition alone but must take other propositions into account too. Idiscuss the significance of these findings for democratic theory.

Keywords: group deliberation; judgment aggregation; judgmenttransformation; belief revision (search for similar items in EconPapers)
JEL-codes: D70 D71 (search for similar items in EconPapers)
Date: 2007-03
New Economics Papers: this item is included in nep-cdm
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Working Paper: Group deliberation and the transformation of judgments: an impossibility result (2007)
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Persistent link: https://EconPapers.repec.org/RePEc:cep:stipep:26

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