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Ítem The cassava seed system in Nigeria: Opportunities and challenges for policy and regulatory reform(International Potato Center) Wossen, T.; Spielman, David J.; Abdoulaye, Tahirou; Kumar, P. LavaÍtem Are developing country policies and investments promoting research and research partnerships in agricultural biotechnology?(Inderscience Publishers) Spielman, David J.; Cohen, Joel I.; Zambrano, PatriciaÍtem Accelerating technical change through ICTs: Evidence from a video-mediated extension experiment in Ethiopia(International Food Policy Research Institute) Abate, Gashaw T.; Bernard, Tanguy; Makhija, Simrin; Spielman, David J.Ítem Rural innovation systems and networks: Findings from a study of Ethiopian smallholders(International Food Policy Research Institute) Spielman, David J.; Davis, Kristin E.; Negash, Martha; Ayele, GezahegnÍtem Strengthening agricultural education and training in Sub-Saharan Africa from an innovation systems perspective: Case studies of Ethiopia and Mozambique(International Food Policy Research Institute) Davis, Kristin E.; Ekboir, Javier; Mekasha, Wendmsyamregne; Ochieng, Cosmas M. O.; Spielman, David J.; Zerfu, EliasÍtem Public-private partnerships and developing-country agriculture: Evidence from the international agricultural research system(Wiley) Spielman, David J.; Hartwich, Frank; von Grebmer, KlausÍtem Measuring agricultural innovation system properties and performance: Illustrations from Ethiopia and Vietnam(International Food Policy Research Institute) Spielman, David J.; Mekonnen, Dawit KelemeworkÍtem Developing the art and science of innovation systems enquiry: Alternative tools and methods, and applications to Sub-Saharan African agriculture(Earthscan) Spielman, David J.; Ekboir, Javier; Davis, Kristin E.Ítem The art and science of innovation systems inquiry: Applications to Sub-Saharan African agriculture(Elsevier) Spielman, David J.; Ekboir, Javier; Davis, Kristin E.