By Jerold J. Duquette
Major League Baseball, alone among industries of its size in the United States, operates as an unregulated monopoly. This 20th-century regulatory anomaly has become known as the "baseball anomaly." Major League Baseball developed into a major commercial enterprise without being subject to antitrust liability. Long after the interstate commercial character of baseball had been established and even recognized by the Supreme Court, baseball's monopoly remained free from federal regulation. Duquette explains the baseball anomaly by connecting baseball's regulatory status to the larger political environment, tracing the game's fate through four different regulatory regimes. The constellation of institutional, ideological, and political factors within each regulatory regime provides the context for the survival of the baseball anomaly.