This paper compares within-sample and out-of-sample fit of a DSGE model with rational expectations to a model with adaptive learning. The Galí, Smets and Wouters model is the chosen laboratory using quarterly real-time euro area data vintages, covering 2001Q1-2019Q4. The adaptive learning model...

The DIW is the largest and oldest economics institute in Germany and conducts research in many fields of economic analysis. In this contribution to the conference celebrating the 80th birthday of this important institution I feel stimulated to address a few analytical issues, raising questions...