Preference aggregation under uncertainty: Savage vs. Pareto

Following Mongin [12, 13], we study social aggregation of subjective expected utility preferences in a Savage framework. We argue that each of Savage's P3 and P4 and incompatible with the Strong Pareto property. A representation theorem for social preferences satisfying Pareto indifference and conforming to the state-dependent expected utility model is provided.

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