Several people have asked me to comment on nominal GDP targeting, as recently proposed by Scott Sumner, Christina Romer and Paul Krugman. I did research on nominal GDP targeting many years ago and found that such targeting proposals had a number of problems, which I summarized in the paper“What Would Nominal GNP Targeting Do to the Business Cycle?” Carnegie-Rochester Series on Public Policy, 1985. Although much has changed in the past quarter century I find many of the same problems with the recent proposals.
One change is that, in comparison with earlier proposals, the recent proposals tend to focus more on the level of NGDP rather than its growth rate. This removes some of the instability of NGDP growth rate targeting caused by the fact that NGDP growth should be higher than its long run target during the catch up period following a recession. But it introduces another problem: if an inflation shock takes the price level and thus NGDP above the target NGDP path, then the Fed will have to take sharp tightening action which would cause real GDP to fall much more than with inflation targeting and most likely result in abandoning the NGDP target.