1. Institute for Food and Resource Economics (ILR) University of Bonn Bonn Germany
2. Institute for Environmental Economics and World Trade (IUW) Leibniz University Hannover Hannover Germany
3. Research Methods Group and Landscapes Governance Theme World Agroforestry (ICRAF) Nairobi Kenya
4. Research Methods Group World Agroforestry (ICRAF) Bonn Germany