Abstract
Discretionary policymakers cannot manage private-sector expectations and cannot co-ordinate the actions of future policymakers. As a consequence, expectations traps and coordination failures can occur and multiple equilibria can arise. In order to utilize the explanatory power of models with multiple equilibria it is necessary to understand how an economy arrives to a particular equilibrium. In this paper, we employ notions of robustness, learnability, and the potential for policy errors to motivate and develop a suite of equilibrium selection criteria. Central among these criteria are whether the equilibrium is learnable by private agents and jointly learnable by private agents and the policymaker. We use two New Keynesian policy models to identify the strategic interactions that give rise to multiple equilibria and to illustrate our equilibrium selection methods. Importantly, although the Pareto-preferred equilibrium is invariably an equilibrium identified by standard numerical iterative solution methods, unless it is learnable by private agents, we find little reason to expect coordination on that equilibrium.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.