Law, Business, and Society 9th Edition by Tony McAdams

Exercise 8

The U.S. government sued DuPont, claiming monopolization of the cellophane market. DuPont produced almost 75 percent of the cellophane sold in the United States. Cellophane constituted less than 20 percent of the "flexible packaging materials" market. The lower court found "[g]reat sensitivity of customers in the flexible packaging markets to price or quality changes."
a. What is the relevant product market
b. Who wins the case Explain. See United States v. E. I. DuPont de Nemours Co., 351 U.S. 377 (1956).