Which of the following is a purpose of antitrust laws in the United States?

• A. To promote competition and efficiency in the marketplace
• B. To protect incumbents from new entrants
• C. To regulate patent rights only
• D. To discourage collaboration among firms

Answer: (A)

Antitrust laws are meant to protect competition so markets stay open and efficient, which benefits consumers through lower prices, better quality, and more innovation. They achieve this by policing anti-competitive practices like price fixing, market division, monopolistic control, and mergers that would lessen competition, ensuring firms compete rather than stifle rivals. This is why the best purpose is to promote competition and efficiency in the marketplace. The other choices don’t fit: protecting incumbents from new entrants would undermine competition; antitrust isn’t limited to regulating patent rights—patents fall under IP law, though antitrust can address misuse in certain cases; and while it restricts harmful collusion, it does not categorically discourage all collaboration, since some joint ventures can be pro-competitive and beneficial.