June 2019

The Dynamic AS/AD model is a good guide to understanding the economy over the last 25 years of low & stable inflation

Two charts help to set the stage. To better understand them, the AD curve should be viewed as a rectangular hyperbola. That means that the elasticity along the curve is unity. In that case, along the curve, NGDP growth is constant, say 5%. In other words, a fall in real growth is exactly offset by a rise in inflation. It also means, from a monetary policy perspective, that velocity (or money demand) changes are exactly offset by changes in money supply. In Chart 1, I illustrate the case of a (negative) demand shock. In that case, NGDP growth falls (to… Read More


Monetary Policy Informed by Fear!

Antonio Fatas writes “This time might not be different”: The US does not seem to be able to sustain a low unemployment rate. Once we reach “full employment” (or even before), unemployment bounces back as we hit a turning point. I have written about this pattern in my previous post: All cycles display a V-shape evolution for unemployment. Unemployment reaches its lowest point around 12 months before the recession and, in most cases, unemployment is already increasing in the months preceding the recession. What is interesting is the absence of a single episode of stable low unemployment (or full employment). It… Read More