American Farms Keep Growing: Size, Productivity, and Policy
总结了美国商业农业的经济学，聚焦近几十年来农场规模的增长及规模分布的变化，并探讨了农场规模分布与生产率增长及补贴政策的关系。
Commercial agriculture in the United States is comprised of several hundred thousand farms, and these farms continue to become larger and fewer. The size of commercial farms is sometimes best-measured by sales, in other cases by acreage, and in still other cases by quantity produced of specific commodities, but for many commodities, size has doubled and doubled again in a generation. This article summarizes the economics of commercial agriculture in the United States, focusing on growth in farm size and other changes in size distribution in recent decades. I also consider the relationships between farm size distributions and farm productivity growth and farm subsidy policy.