"Biography of William J. Spillman, scientist and educator for the United States Department of Agriculture. Explores Spillman's role in the development of the agricultural economics, the agricultural New Deal, genetics research, agricultural education and the Cooperative Extension Service, the...

Prior research shows long-run productivity growth in agriculture is associated with increases in the stock of public scientific knowledge and private patented inventions. However, private inventions may be a function of the stock of public knowledge. In this paper, we examine the possibility...