A Study of the Antitrust Laws Staff Report of the Subcommittee on Antitrust and Monopoly of the Committee on the Judiciary, United States Senate, Eighty-fourth Congress, Second Session, Pursuant to S. Res. 61 as Extended (84th Cong., 1st Sess.), to Study the Antitrust Laws of the United States, and Their Administration, Interpretation and Effect. Bigness and Concentration of Economic Power--a Case Study of Gneral Motors Corporation