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.
For the Illinois village formerly known as Vienna, see Astoria, Illinois Vienna is a city in Johnson County, Illinois, United States. The population was 1,234 at the 2000 census. It is the county seat of Johnson County, and the site of a well-known state penitentiary. Heron Pond - Little Black Slough Nature Preserve, a National Natural Landmark, is nearby. The town's name is pronounced differently from the English name for the Austrian capital of the same name.