Recent developments in inflation and M3 velocity in the euro area have raised serious doubts about the reliability of M3 growth as a pillar of the ECB's monetary policy strategy. We develop a very flexible and comprehensive state-space framework for modeling the velocity of circulation. Our...

We introduce a high-dimensional structural time series model, where co-movement between the components is due to common factors. A two-step estimation strategy is presented, which is based on principal components in differences in a first step and state space methods in a second step. The...