In a speech, Fed Vice Chair Richard Clarida said neutral interest rates appear to have fallen in the US and abroad. And, “this global decline in r* is widely expected to persist for years”. He emphasized the importance of the trend as “all else being equal, a fall in neutral rates increases the likelihood that a central bank’s policy rate will reach its effective lower bound (ELB) in future economic downturns. ” And that in turn “could make it more difficult during downturns for monetary policy to support household spending, business investment, and employment, and keep inflation from falling too low.”
Clarida pointed to another key development in decreasing responsiveness of inflation to resource slack. That is, “short-run Phillips curve appears to have flattened, implying a change in the dynamic relationship between inflation and employment”. He warned that a flatter Philips curve increases the cost of reversing unwelcome increase in long-run inflation expectations. And “a flatter Phillips curve makes it all the more important that longer-run inflation expectations remain anchored at levels consistent with our 2 percent inflation objective.”
