I am Co-Head of the Department of Macroeconomics and Public Ecoomics at RWI Essen and Professor for Applied Macroeconomics at TU Dortmund. Previously, I was Professor at RWTH Aachen. I am affiliated with IIES at Stockholm University, CEPR and CESifo. I also serve as research professor at the ifo Institute Munich. My research focuses on macroeconomics, in particular business cycles, labor and monetary economics. I hold a Ph.D. in Economics from the University of Bonn.