@BOOKLET {TAKESHIMA:2022, title = {Seed certification and maize, rice and cowpea productivity in Nigeria: an insight based on nationally representative farm household data and seed company location data}, author = {Takeshima, H. and Abdoulaye, T. and Andam, K. S. and Edeh, H. O. and Fasoranti, A. and Haile, B. and Kumar, P. L. and Nwagboso, C. and Ragasa, C. and Spielman, D. and Assfaw Wossen, T. }, year = {2022}, month = {December}, address = {Washington, DC.}, howpublished = {IFPRI discussion paper 02147}, note = {WAHub; Science Area PPPH; CRP Maize; CRP GRiSP; Rice; CRP Grain Legumes; Cowpea; 39p.}, url = {https://doi.org/10.2499/p15738coll2.136474}, doi = {10.2499/p15738coll2.136474}, }