Arrow’s theorem in judgment aggregation
AbstractIn response to recent work on the aggregation of individual judgments on logically connected propositions into collective judgments, it is often asked whether judgment aggregation is a special case of Arrowian preference aggregation. We argue the op- posite. After proving a general impossibility result on judgment aggregation, we construct an embedding of preference aggregation into judgment aggregation and prove Arrow’s theorem as a corollary of our result. Although we provide a new proof of Arrow’s theorem, our main aim is to identify the analogue of Arrow’s theorem in judgment aggregation, to clarify the relation between judgment and preference aggregation and to illustrate the generality of the judgment aggregation model.
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Bibliographic InfoPaper provided by London School of Economics and Political Science, LSE Library in its series LSE Research Online Documents on Economics with number 19295.
Length: 14 pages
Date of creation: Oct 2005
Date of revision:
Find related papers by JEL classification:
- D70 - Microeconomics - - Analysis of Collective Decision-Making - - - General
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