The economics literature lacks articles that provide a broad roadmap-let alone a logical explanation-of the new set of Federal Reserve policy tools that were created to counter the COVID-19 recession. This study provides an overview of the motivation for these new credit-easing programs-namely...

Galí (2014) showed that a monetary policy rule that raises interest rates in response to bubbles can paradoxically lead to larger bubbles. This comment shows that a central bank that wants to dampen bubbles can always do so by raising interest rates aggressively enough. This result is different...

An economy exhibits structural heterogeneity when the forecasts of different agents have different effects on the determination of aggregate variables. Various forms of structural heterogeneity can arise and we study the important case of economies in which agents' behavior depends on forecasts...