We describe a class of monetary economies that generate persistent episodes of high and low inflation. In this class of economies, variations in expectations can lead private agents to take actions which then make it optimal for the monetary authority to validate those expectations. We think...

This paper examines what we have learned about monetary policy strategy and considers how we should change our thinking in this regard in the aftermath of the 2007-09 financial crisis. It starts with a discussion of where the science of monetary policy stood before the crisis and how central...