1. Social Science and Statistics Unit, Cocoa Research Institute of Ghana, P.O. Box 8, New-Tafo, Akyem, Eastern Region, Ghana
2. Department of Geography and Resource Development, University of Ghana, Legon, Ghana
3. Plant Breeding Division, Cocoa Research Institute of Ghana, P.O. Box 8, New-Tafo, Akyem, Eastern Region, Accra, Ghana
4. Agronomy Division, Cocoa Research Institute of Ghana, P.O. Box 8, New-Tafo, Akyem, Eastern Region, Accra, Ghana