@article{Masters:174532,
      recid = {174532},
      author = {Masters, William A. and Bedingar, Touba and Oehmke, James  F.},
      title = {The impact of agricultural research in Africa: aggregate  and case study evidence},
      journal = {Agricultural Economics: The Journal of the International  Association of Agricultural Economists},
      address = {1998-09},
      number = {968-2016-75293},
      pages = {6},
      year = {1998},
      abstract = {This paper presents case-study results and aggregate data  to evaluate the impact of research in African agriculture.  Of 32 case
studies, all but eight report annual returns  over 20% and many are far higher, with most gains arising  in the late 1980s and
1990s. Spurred by policy reforms and  changing incentives, these innovations have led to  sustained growth in aggregate cereal
crop yields since  1985. Africa's belated 'green revolution' is based on new  varieties (often with early maturation for drought
escape),  complemented by new management techniques (typically  labor-intensive efforts to conserve soil moisture and  build
soil fertility). © 1998 Elsevier Science B.V. All  rights reserved.},
      url = {http://ageconsearch.umn.edu/record/174532},
      doi = {https://doi.org/10.22004/ag.econ.174532},
}