Justifiable group choice

Klaus Nehring and Clemens Puppe ()

Journal of Economic Theory, 2010, vol. 145, issue 2, 583-602

Abstract: We study the judgment aggregation problem from the perspective of justifying a particular collective decision by a corresponding aggregation on the criteria. In particular, we characterize the logical relations between the decision and the criteria that enable justification of a majority decision through a proposition-wise aggregation rule with no veto power on the criteria. While the well-studied "doctrinal paradox" provides a negative example in which no such justification exists, we show that genuine possibility results emerge if there is a gap between the necessary and the sufficient conditions for the decision. This happens, for instance, if there is only a partial consensus about the appropriate criteria for the decision, if only a subset of these criteria can be elicited, or if the judgment on criteria is based on probabilistic acceptance thresholds.

Keywords: Judgment; aggregation; Logical; aggregation; Social; choice; Majority; voting; Justifying; choice; (Non-)truth-functionality (search for similar items in EconPapers)
Date: 2010
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Citations: View citations in EconPapers (12)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:jetheo:v:145:y:2010:i:2:p:583-602

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