RT Journal Article T1 The Theory of Implementation when the Planner is a Player A1 Corchón, Luis C. A1 Baliga, S. A1 Sjostrom, T. AB In this paper we study a situation where the planer cannot commit to a mechanism and the outcome function is subsituted by the planneser herself. We assume(i) agents have complete information and play simultaneously and (ii) gieve the messages announced by the planner reacts in an optimal way given her beliefs. This transforms the implementation problem into a signaling game. We derive necesary and sufficient conditions for interactive implementation under different restrictions on the planner´s out-of equilibrium beliefs. We compare our results to standard results on Nash implementation. PB Elsevier SN 1432-0479 YR 1997 FD 1997 LK https://hdl.handle.net/10016/4187 UL https://hdl.handle.net/10016/4187 LA eng DS e-Archivo RD 1 jun. 2024