By 2015, inflation rates in more than 85 percent of a broad sample of more than 120 economies were below long-term expectations, and about 20 percent were in deflation—that is, facing a fall in the aggregate price level for goods and services (Figure 3.2). While the recent decline in inflation coincided with a sharp drop in oil and other commodity prices, core inflation—which excludes the more volatile categories of food and energy prices—has remained below central bank targets for several consecutive years in most of the major advanced economies.
Economic slack and changes in commodity prices are the main drivers of lower inflation since the Great Recession.
Central banks have been so good at creating low inflation since the early 1990s that it is now the expected norm by the body politic. Any deviation from low inflation is simply intolerable. In the US, everyone from the media to politicians to the average person start to freak out if inflation heads north of 2%. This mentality seems even worse in Europe. Inflation-targeting central banks, in other words, have worked themselves into an inflation-targeting straitjacket that has removed the few degrees of freedom they had. It is hard to imagine Yellen and Draghi being able to raise inflation temporarily above 2% in this environment. All they can do is operate in the 1-2% inflation window. Inflation targeting’s success has become it own worst enemy.
Another way of saying this is that the space for doing macro policy has shrunk to the small window of 1-2% inflation. Not only is monetary policy constrained by this, but so is fiscal policy…
For these reasons inflation targeting has become the poisoned chalice of macroeconomic policy. It was a much needed nominal anchor in the 1990s that helped restore monetary stability. Its limitations, however, have become very clear over the past decade and now is preventing the world from having the recovery it needs…
If a trucker gets stuck in traffic jam, he will have to temporarily speed up afterwards to make up for lost time. On average, his speed for the trip will be the legal speed limit but only if he temporarily speeds up after the traffic jam. Likewise, an economy may need temporarily higher-than-normal inflation after a sharp recession to return to full employment. This also implies temporarily higher-than-normal nominal demand growth. On average, this temporary pickup will keep inflation and nominal demand growth on target. Running a little hot, therefore, is necessary sometimes. Currently, however, this policy flexibility is not possible.