Antitrust and Trade Regulation laws aim to promote free competition in the marketplace. Agreements or cooperative efforts by two or more entities that affects or restrains competitors is illegal under these laws. The Sherman Act makes illegal any contract, combination, or conspiracy in restraint of trade or commerce and makes monopolies and attempts, combinations, or conspiracies to monopolize illegal. The Clayton Act regulate price discrimination, tying and exclusive dealing contracts, stock acquisition and interlocking directorates.
Gresham is a city located in Multnomah County, Oregon, United States immediately east of Portland. It was named for the American Civil War general, and Postmaster General, Walter Quinton Gresham. The population was 90,205 at the 2000 census; in 2008, the Population Research Center estimated the city's population at 101,221. This makes Gresham the fourth largest city in Oregon.