The term monopoly as used in the law is not a tool of analysis but a standard of evaluation. Not all trusts are held monopolistic but only" bad" trusts; not all restraints of trade are to be condemned but only" unreasonable" restraints.
Edward S. Mason, "Monopoly in Law and Economics." The Yale Law Journal 47.1 (1937): 34-49; Cited in: Barry Hawk (1998), International Antitrust Law & Policy: Fordham Corporate Law 1998. p. 362