Columbia subject headings:
Antitrust law--Economic aspects.
Competition.
Price discrimination.
Railroads and state.
Harvard subject headings:
Antitrust law--Economic aspects.
Competition.
Price discrimination
Railroads and state.
Railroads--Deregulation.
Princeton subject headings:
Antitrust law--Economic aspects.
Competition.
Price discrimination.
Railroads and state.
Railroads--Deregulation.