FILE PHOTO: Marcel Fratzscher, chairman of the German Institute for Economic Research (DIW), speaks during an interview with Reuters in his office in Berlin, Germany, March 7, 2016. Picture taken March 7, 2016. REUTERS/Fabrizio Bensch
FILE PHOTO: Marcel Fratzscher, chairman of the German Institute for Economic Research (DIW), speaks during an interview with Reuters in his office in Berlin, Germany, March 7, 2016. Picture taken March 7, 2016. REUTERS/Fabrizio Bensch