Boadu, Paul, Aidoo, Robert, Ohene-Yankyera, Kwasi, Kleih, Ulrich, Abdoulaye, Tahirou, Orchard, John and Maroya, Norbert (2019) A latent class modelling approach to evaluating farmers’ preferences for pona seed yam certification systems and their willingness to pay in Ghana. International Journal of Agricultural Extension and Rural Development Studies, 6 (1). pp. 1-25. ISSN 2058-9093 (Print), 2058-9107 (Online)

Boadu, Paul, Aidoo, Robert, Yankyera, Kwasi-Ohene, Kleih, Ulrich, Abdoulaye, Tahirou, Maroya, Norbert, Orchard, John and Bekoe, Stephen (2018) Farmers’ perception about quality of planted seed yam and their preferences for certified seed yam in Ghana. International Journal of Food and Agricultural Economics, 6 (3). pp. 71-83. ISSN 2147-8988 (Print), 2149-3766 (Online)