1. Department of Agricultural Economics and Agribusiness Faculty of Agriculture and Veterinary Medicine, University of Buea, Cameroon
2. Centre for Independent Development Research (CIDR), P.O. Box 58 Buea, SWR, Cameroon
3. Center for International Forestry Research (CIFOR), Yaounde, Cameroon
4. Institute for Agronomic Research and Development, Cameroon
5. University of Kinshassa, Democratic Republic of Congo
6. University of Bangui, Bangui, Republic of Central Africa