Slow Recoveries and Unemployment Traps: Monetary Policy in a Time of Hysteresis

We analyze monetary policy in a model where temporary shocks can permanently scar the economy’s productive capacity. Unemployed workers’ skill losses generate multiple steady-state unemployment rates. When monetary policy is constrained by the zero bound, large shocks reduce hiring to a point where the economy recovers slowly at best – at worst, it falls into a permanent unemployment trap. Since monetary policy is powerless to escape such traps ex-post, it must avoid them ex-ante. The model quantitatively accounts for the slow U.S. recovery following the Great Recession, and suggests that lack of swift monetary accommodation helps explain the European periphery’s stagnation.