A boycott is is an agreement by two or more people who refuse to do business with a person or company. Unlike a single company's boycott, or a boycott by consumers of a particular business, a group boycott is illegal under antitrust laws because it has the effect of restraining freedom of trade. A group boycott is a per se violation of the antitrust laws; meaning that antitrust laws are violated even if the businesses do not intend to restrain competition.
