Prof. Dr. Grethe holds the chair of International Agricultural Trade and Development at the Humboldt University of Berlin. He has ample experience in the analysis of policies related to agriculture, development and trade in the European Union as well as many other countries such as Ethiopia, Sudan, Palestine, Turkey, Israel, and China. Since 2013, Prof. Dr. Grethe is the chair of the Scientific Advisory Board on Agricultural Policy, Food and Consumer Health Protection at the Federal German Ministry of Food and Agriculture. Prof. Dr. Grethe is also consultant for several international organizations. Prof. Dr. Grethe is the responsible person for the Master program on agricultural economics at the Humboldt University of Berlin.