Egalitarian Equivalence under Asymmetric Information

• Authors: Geoffroy De Clippel, David Pérez-Castrillo and David Wettstein
• BSE Working Paper: 431 | February 2026
• Keywords: asymmetric Information, Pareto Efficiency, Egalitarian Equivalence
• JEL codes: D62, C71

We propose a definition of egalitarian equivalence that extends Pazner and Schmeidler’s (1978) concept to environments with incomplete information. If every feasible allocation rule can be implemented by an incentive compatible mechanism (as, for instance, in the case of non-exclusive information), then interim egalitarian equivalence and interim incentive efficiency remain compatible, as they were under complete information. When incentive constraints are more restrictive, on the other hand, the two criteria may become incompatible.