Information and Small Group Effectiveness in Large Quasilinear Economies
44 Pages Posted: 20 Dec 2015 Last revised: 8 Jul 2017
Date Written: July 7, 2017
In large quasilinear economies, we provide sufficient conditions to establish the nonemptiness of several versions of approximate interim cores with endogenous communication. This is done by proving nonemptiness of approximate ex post cores satisfying incentive compatibility. When the number of agents with private information remains finite, the main argument relies on an adaptation of the small group effectiveness condition, previously proposed for games of complete information. Based on a related argument, the result goes through when all agents are informationally small.
Keywords: Asymmetric Information; Large Quasilinear Economies; Small Group Effectiveness; Approximate Cores.
JEL Classification: C71, C72, D51, D82
Suggested Citation: Suggested Citation