東北大学経済学研究科 准教授

We consider a principal-agent model in which the principal can terminate the agent’s project and an outsider can affect the project’s result. Only the agent can observe the out- sider’s action and sends a message to the principal. Under strategic uncertainty about the outsider’s action in complete information, sequential equilibrium is a suitable equilibrium concept to select the robust outcome and to completely identify the underlying posterior belief. We prove the revelation principle for sequential equilibrium in such a game. Based on this revelation principle, we present a legitimate and simple form of the limited liability constraint on a financial contract that is robust to strategic uncertainty.