The Princeton School and the Zero Lower Bound

Abstract

In the early 2000s, a small group of economists at Princeton University revived the debate over liquidity traps and developed a framework for monetary policy at the zero lower bound. Paul Krugman’s 1998 Brookings paper provides the basic model that underlies much of the new view, but work by Ben Bernanke, Michael Woodford, Gauti Eggertsson, and Lars Svensson also played an important role in reshaping our view of stabilization policy at the zero bound. By the late 2010s, their ideas had begun to influence policy at the Federal Reserve. Research by Krugman and other Princeton School members provided the rationale for the Fed’s new policy of flexible average inflation targeting, which is the most important shift in the Fed’s policy regime in several decades. Comparing the Princeton School to other recent developments such as market monetarism and NeoFisherism helps to illuminate both sets of ideas.