In this paper, we study full implementation problem by mechanisms that allow delay. The delay on the equilibrium path may be zero, infinitesimally small or a fixed positive number. In all these three cases, implementable rules are characterized by a monotonicity-like condition alone, including...

I study costly information acquisition in a two-sided matching problem, such as matching applicants to schools. Applicant's utility is a sum of common and idiosyncratic components. The idiosyncratic component is unknown to applicants but can be learned at a cost. When applicants are assigned...

Motivated by growing evidence of agents' mistakes in strategically simple environments, we propose a solution concept---robust equilibrium---that requires only an asymptotically optimal behavior. We use it to study large random matching markets operated by the applicant-proposing Deferred...