Least convex capacities
Economic Theory , Volume 13 - Issue 2 p. 263- 286
Debreu proposed the notion of 'least concave utility' as a way to disentangle risk attitudes from the certainty preferences embedded in a vonNeumann Morgenstern index. This paper studies preferences under uncertainty, as opposed to risk, and examines a corresponding decomposition of preference. The analysis is carried out within the Choquet expected utility model of preference and is centered on the notion of a least convex capacity.