Actual policy decisions are made in real time and are not irrevocable. These observations are mundane, but most policy modeling has neglected them. We show that when policy is made in an environment of uncertainty, costs of switching policies give the option to wait positive value. This insight...

We document that monetary policy inertia can help alleviate problems of indeterminacy and non-existence of stationary equilibrium observed for some commonly-studied monetary policy rules. We also find that inertia promotes learnability of equilibrium. The context is a simple, forward-looking...