Julian M. Alston is a professor in the Department of Agricultural and Resource Economics at the University of California-Davis where he serves as associate director for science and technology at the University of California Agricultural Issues Center. He is co-editor with Philip G. Pardey and Vincent H. Smith of Paying for Agricultural Productivity, also available from Johns Hopkins. Philip G. Pardey is a senior research fellow at the International Food Policy Research Institute and an adjunct professor at the University of Minnesota Department of Agricultural and Applied Economics. Michael J....