Market definition.
wU. S. v. Alcoa (Rome) 377 U. S. 271 (1964).
nAlcoa buys another maker of aluminum cable.
nCourt says aluminum a separate market from copper.
wU. S. v. Continental Can Co. 378 U. S. 441 (1964).
nContinental acquired a maker of glass jars. 
nCourt ignores cross-elasticity and defines market as metal and glass containers.  What about paper, plastic, etc.?
wGerrymandering markets.
Supreme Court veers away from the Cellophane standard.