1. Department of Agricultural Economics, Wolaita Sodo University, Wolaita, Ethiopia
2. Center for Development Research (ZEF), University of Bonn, Genscherallee 3, Bonn, Germany
3. Stockholm Environment Institute-Africa, World Agroforestry Centre, Nairobi, Kenya
4. World Agroforestry (ICRAF), United Nations Avenue, Nairobi, Kenya
5. Center for African and Asian Studies, Addis Ababa University, Addis Ababa, Ethiopia
6. International Livestock Research Institute (ILRI), Nairobi, Kenya