Berthold Busch is Senior Economist at the Cologne Institute for Economic Research (Institut der deutschen Wirtschaft Köln - IW Köln), the largest privately financed economic think tank in Germany. He is an expert on European Integration in the institute's research unit International Economics and Economic Outlook. Before taking this position in 2015, he was responsible for this topic in several positions in the IW Köln which he joined in 1984. His economic studies were undertaken in Marburg. He has published on a wide range of issues of European integration, such as EMU governance, the Single Market, and EU finances.