Prof. Dr. Polk was a visiting researcher in ZEW's Research Group "Competition and Regulation" on July 2 and 3, 2015. He is Professor of Economics at the Berlin School of Economics and Law. His research interests lie in the fields of industrial economics and competition policy issues, of which he also has first-hand experience from his previous position in the German Federal Cartel Office. During his visit to ZEW, a cooperation in the field of cartel research was agreed upon.