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.
Petersburg is a city in Menard County, Illinois, on the bluffs and part of the floodplain overlooking the Sangamon River. It is part of the Springfield, Illinois Metropolitan Statistical Area. The population was 2,299 at the 2000 census. It is the county seat of Menard County. Petersburg is located approximately two miles north of New Salem, the original settlement where Abraham Lincoln first settled when he came to Illinois.