Supply and Demand Functions for Multiproduct U.S. Cash Grain Farms: Biases Caused by Research and Other Policies
估计了美国多产品现金谷物农场的供给与需求弹性，以及公共和私人作物研究、推广和农民教育导致的投入产出偏差，发现公共作物研究的社会回报率约为62%。
Abstract This study presents new estimates of supply and demand elasticities for U.S. multiproduct cash grain farms and estimates of input and output bias effects caused by public and private crop research, extension, and farmers' schooling. The study also shows that the social rate of return to public crop research is large—about 62 percent.