Constrained Efficiency with Adverse Selection and Directed Search Staff working paper 2017-15 Mohammad Davoodalhosseini Constrained efficient allocation (CE) is characterized in a model of adverse selection and directed search (Guerrieri, Shimer, and Wright (2010)). CE is defined to be the allocation that maximizes welfare, the ex-ante utility of all agents, subject to the frictions of the environment. Content Type(s): Staff research, Staff working papers JEL Code(s): D, D8, D82, D83, E, E2, E24, G, G1, J, J3, J31, J6, J64 Research Theme(s): Financial markets and funds management, Market structure, Financial system, Financial system regulation and oversight, Models and tools, Economic models, Monetary policy, Monetary policy framework and transmission