@TECHREPORT {WALKER:2014, title = {Measuring the effectiveness of crop improvement research in sub-Saharan Africa from the perspectives of varietal output, adoption, and change: 20 crops, 30 Countries, and 1150 cultivars in farmers' fields}, author = {Walker, T. and Alene, A. and Ndjeunga, J. and Labarta, R. and Yigezu, Y. and Diagne, A. and Andrade, R. and Andriatsitohaina, R. M. and De Groote, H. and Mausch, K. and Yirga, C. * and Simtowe, F. and Katungi, E. and Jogo, W. and Jaleta, M. and Pandey, S. J. }, year = {2014}, month = {July}, institution = {CGIAR Independent Science & Partnership Council (ISPC)}, address = {Rome, Italy}, note = {Synthesis report for Objectives 1 and 2 of Bill & Melinda Gates Foundation's Diffusion and Impact of Improved Varieties in Africa (DIIVA) Project.; 105p.; SAHub}, }