Surely, they say, enormous increases in the monetary base are likely to be accompanied by substantial price level increases. The problem with this story is that the banks have not been lending these reserves nearly enough to generate big increases in broad monetary aggregates. And even if they did, as an indicator of inflation, the monetary aggregates lost their predictive content many decades ago. The evidence, again, is that inflation remains low. But what if? What if lending picks up? Well, that would be really terrific. Dramatically higher bank lending would surely be associated with higher loan demand and a generally stronger economy. Strong growth and diminishing resource slack would be part of this story, and a rising rate environment would be a natural force diminishing the rising inflation pressures. In the meantime, monitoring the entire state of the economy along with  6  Evans and Fisher (2011). BIS central bankers’ speeches  5  inflation seems like a sensible and appropriate safeguard against this currently low probability scenario. Third, another potential source of inflationary pressures would be rising inflation expectations. Here, I mean a breakout of inflation expectations separate from any fundamentals that might accompany the previously discussed cases of rising commodity prices and stronger bank lending. One could think of this as the spontaneous combustion theory of inflation. The story goes like this: Households and businesses simply wake up one day and expect higher inflation is coming without any further improvement in economic fundamentals.
Despite current low rates, I still often hear people say that higher inflation is just around the corner. I confess that I am somewhat exasperated by these repeated warnings given our current environment of very low inflation. Many times, the strongest concerns are expressed by folks who said the same thing back in 2009 and then in 2010 and, well, you get the picture. OK, five years later we still need to carefully assess this very serious question. Let me offer five reasons why I still see the economic environment as pointing to below-target inflation for several years. First, many commentators see rising commodity prices as a harbinger of rising inflation pressures. Certainly, back in 2008 and 2010 there were instances when energy and commodity prices rose to high levels. This put pressure on inflation and also reduced aggregate demand. There is a lot of evidence that these types of relative price increases result in only transitory increases in consumer price levels. 6 At the moment, even these transitory upward pressures are absent, and the current weak state of global demand contributes to downward pressures. Until something unexpected, and frankly positive, happens with the world economy, commodity prices seem like an even more unlikely propellant for strongly rising inflation than they usually would be. Second, some say a classic warning sign of inflation is the enormous size of the Fed’s balance sheet and the greater than $ trillion of excess reserves sitting on commercial banks’ books.