The traditional school reacts broadly in line with the Taylor rule and is fairly activistic. Lower growth is expected to lower inflation in the medium term due to more slack in the economy. This in turn implies lower central bank rates. It is pretty much how policy has been governed over the last 10 years and explains why ECB cut rates in 2001 when inflation at 3% was clearly above their target. Another school is gaining ground, though, which could be called the non-activist school. They broadly see the current problems as an effect of overly loose monetary policy in the past. Policy makers have been too activistic and put too much weight on short term factors rather than structural factors that impact inflation in the long run. This school is not convinced that lower growth will lead to lower inflation. They put weight on money growth and structural drivers such as globalisation. They are also more worried about a de-anchoring of inflation expectations.
The rate hike from ECB in July likely represents the growing influence from what we have labelled the non-activist school. But the two schools are present in all central banks, which can be seen in the great division of views within FOMC (where Fisher still votes for a hike), and Bank of England (where Besley votes for a hike while Blanchflower votes for a cut).







