The Emich Motors Corp. v. General Motors Corp., 1950, is a U.S Supreme Court case that revolved around antitrust laws and the automobile industry. The plaintiffs, Emich Motors Corporation and others, accused General Motors of monopolistic practices by controlling the supply of new cars to their dealerships in violation of the Sherman Antitrust Act. They claimed this control allowed GM to manipulate prices unfairly and restrict competition within the market place. The defendants countered that they were merely managing their business operations efficiently under challenging circumstances such as post-war shortages rather than engaging in anti-competitive behavior. The Supreme Court ruled in favor of Emich Motors Corporation stating that General Motor's actions did indeed constitute an illegal restraint on trade due to its manipulation over car distribution which affected pricing mechanisms negatively for other competitors within the industry.

In the dissenting opinion for Emich Motors Corp. et al. v. General Motors Corp. et al., Justice Jackson disagreed with the majority's interpretation of anti-trust laws and their application to this case, arguing that it expanded them beyond their intended scope and purpose. He contended that these laws were designed to protect competition, not individual competitors, and should only be applied in cases where monopolistic practices harm market competition as a whole rather than just disadvantaging specific businesses within it. In his view, General Motors' actions did not constitute an illegal monopoly because they did not prevent other car manufacturers from competing or consumers from choosing between different products; instead, they merely affected the distribution of cars among dealerships without limiting overall supply or demand in any way.