英文文献：Increasing Concentration In The U.S. Hard Wheat Milling Industry
英文文献作者：Stiegert, Kyle W.,Carton, Olivier
英文文献摘要：
This research shows that increased concentration in the U.S. wheat milling industry has not led to noncompetive pricing in upstream or downstream markets. Increased concentration has helped to reduce the marketing margin by $0.65 for every 100 pounds of flour produced. This is about 7% of the average marketing margin.