The Federal Open Market Committee’s (FOMC) policy strategy update incorporates two key changes. The first is a shift to flexible average inflation targeting (FAIT), while the second is a move to what we will call a patient shortfall strategy. FAIT represents a shift in the direction of price-level targeting in which the FOMC intends to make up for past inflation misses (see our previous post). As Fed Governor Brainard recently explained, the strategy of increased patience, embedded in language that focuses on employment “shortfalls” rather than “deviations,” reflects reduced willingness to act preemptively against inflation when the unemployment rate (u) declines below estimates of its sustainable level (call it u*).

The Committee will need to explain what these two changes mean for the determinants of policy—what we think of as their reaction function. For example, FAIT implies that the FOMC’s short-term inflation objective will change over time—possibly even from meeting to meeting. For the policy to have its intended impact of shifting inflation expectations, we all need to know the Fed’s inflation target. Similarly, having downgraded the role of the labor market as a predictor of inflation, the central bank will need to explain how it aims to control inflation going forward. While patience is the broad message, pointing to a more backward-looking approach to control, it seems likely that attention will shift to other inflation predictors. But again, if this shift is to have the intended impact on expectations, it is important that the Fed be clear about how it is forecasting inflation.

In this post, we compare the practical importance of these two strategic shifts. Our conclusion is that, while neither appears very large on average, the patient shortfall strategy looks to be the more important of the two….