英文文献：The Role Of Research And Education In Shifting Agricultural Productivity
英文文献作者：Lambert, L. Don
英文文献摘要：
Previous cross sectional studies are suspect because of intercorrelation between education and ability and the pervasiveness of research results. Historical analysis indicates that, for most of the last century, the educational level may have exceeded the level required for maximum efficiency. The role of research is indeterminate.