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.
Rowena (pronounced "roh-WEE'-nuh") is an unincorporated community in Minnehaha County, South Dakota along South Dakota State Highway 42. Rowena is located at 43°31′13″N 96°33′20″W / 43.52028°N 96.55556°W / 43.52028; -96.55556, just over a mile north of the border with Iowa, about 5 miles (8.0 km) east of Sioux Falls, and 5 miles (8.0 km) west of the Minnesota border, at an elevation of 1,411 feet (430 m). The ZIP Code is 57056.