“…Also, the 50 states (plus the District of Columbia) all have antitrust laws, and their attorneys general occasionally bring their own cases or join the DOJ in bringing cases. For discussions of state‐level antitrust activities, see, for example, Feinberg and Reynolds (), Feinberg and Husted (), Feinberg (), and Feinberg, Husted, and Szucs (). See also the various editions of Kwoka and White for the discussion of mergers and other issues that have involved the STB, the FCC, other regulatory agencies, and the states.…”