Strategic and structural uncertainties in robust implementation

Résumé

This paper discusses some connections among several robustness concepts of mechanisms in terms of agents' behaviors. Specifically, under certain conditions such as private values and ``rich'' interdependent values, we show that implementation in (one-round or iterative) undominated strategies, a solution concept robust to strategic uncertainty, is equivalent to Bayesian implementation with arbitrary type spaces, a solution concept robust to structural uncertainty.