Understanding US Monopolization Claims: The Role of Exclusive Dealing
Monopolization claims under US antitrust law are often complex and nuanced, yet they remain essential for maintaining fair competition. One of the key issues that frequently arises in these cases is exclusive dealing. But what exactly does this mean?

Monopolization claims under US antitrust law are often complex and nuanced, yet they remain essential for maintaining fair competition. One of the key issues that frequently arises in these cases is exclusive dealing. But what exactly does this term mean, and how does it factor into monopolization claims? In this article, we’ll explore what exclusive dealing entails, the legislation that governs these claims, the legal standards plaintiffs need to meet, and some recent cases that illustrate how these concepts work in practice.
What Is Exclusive Dealing in Monopolization Claims?
At its core, exclusive dealing refers to an arrangement where a supplier requires buyers to purchase solely from them, effectively preventing competitors from entering or expanding in the market. This practice can lead to monopolization concerns if it grants a company enough power to control prices or exclude competition. While exclusive dealing can be entirely legal when it encourages efficiencies or genuine competitive behavior, it becomes problematic when it is used to willfully acquire or maintain monopoly power. The real challenge for courts and plaintiffs is determining when exclusive dealing shifts from a legitimate business practice to an unlawful attempt to dominate the market.
Relevant Legislation for Monopolization Claims
Monopolization claims in the US primarily fall under Section 2 of the Sherman Act. This law makes it illegal to “monopolize, or attempt to monopolize… trade or commerce among the several States, or with foreign nations.” Companies found in violation of this law can face significant penalties, with fines reaching up to $100 million.
In addition to the Sherman Act, Section 4 of the Clayton Act empowers private individuals or entities to bring lawsuits for monopolization. If successful, plaintiffs are entitled to triple damages as a form of punishment and deterrence for anticompetitive behavior. This provision emphasizes the severity with which the law treats monopolization and the harm it can inflict on the competitive marketplace.
The Legal Standard for Proving Exclusive Dealing Claims
To succeed in a monopolization claim involving exclusive dealing, a plaintiff must prove three essential elements under Section 2 of the Sherman Act: monopoly power, exclusionary conduct, and antitrust injury. Each of these components requires careful examination and evidence, so let’s break them down in more detail.
1. Monopoly Power: Defining Market Dominance
Monopoly power is defined as the ability to control prices or exclude competition. Courts consider several factors when assessing whether a company holds monopoly power. One critical indicator is market share. Generally, if a company controls less than 50% of the market, courts are reluctant to find that it holds monopoly power. However, once market share exceeds 50%, the likelihood of a monopoly finding increases significantly.
Another key consideration is barriers to entry. If competitors face significant obstacles when attempting to enter the market, such as high startup costs, regulatory challenges, or exclusive contracts that lock out new entrants, this supports the conclusion that the company possesses monopoly power. Courts also look at whether the company has the capacity to restrict output or raise prices profitably. If evidence shows that the company can limit supply to drive prices up without losing customers, it is more likely to be considered a monopolist.
2. Exclusionary Conduct: Lawful vs. Unlawful Practices
Not all dominant firms are monopolists. The law distinguishes between legitimate competitive success and exclusionary conduct. A company that achieves dominance by offering better products, services, or prices is not violating the law. However, if a company maintains its dominance by actively excluding competitors, that’s where problems arise.
To determine whether conduct is exclusionary, courts often apply the “Rule of Reason” test. This test first requires the plaintiff to show that the defendant’s actions had an anticompetitive effect, such as driving competitors out of the market or raising prices. Once the plaintiff makes this showing, the burden shifts to the defendant to offer a procompetitive justification. In other words, the defendant must prove that their actions benefit consumers, such as by lowering prices or improving quality. If the defendant provides a valid justification, the burden shifts back to the plaintiff to show that the anticompetitive harm outweighs the procompetitive benefit.
Another useful tool for identifying exclusionary conduct is the profit-sacrifice test, also known as the no-economic-sense test. This test examines whether the defendant’s actions made economic sense only because they excluded competitors. In Verizon v. Trinko, the court cited Aspen Skiing as an example where a company was willing to sacrifice short-term profits in order to eliminate competition, which signaled exclusionary intent.
3. Antitrust Injury: Proving Harm to Competition
A successful monopolization claim requires proof that the conduct harmed the competitive process, not just the plaintiff’s business. To establish standing in court, plaintiffs must demonstrate a clear causal connection between the defendant’s anticompetitive behavior and their injury. The harm must be of the type that antitrust laws are designed to prevent, such as restricted competition, higher prices, or reduced innovation.
Courts also consider whether the defendant intended to cause harm and whether there are more direct victims who suffered from the monopolistic conduct. Finally, they look at whether calculating damages would be straightforward or risk duplicating compensation for the same harm.
Types of Exclusionary Conduct
Exclusive dealing claims often involve specific types of exclusionary practices. One common example is exclusive supply agreements, where suppliers agree to sell their products only to a particular buyer, preventing competitors from accessing essential supplies. Similarly, tying arrangements force customers to buy an additional product to access the one they actually want.
Other exclusionary practices include predatory pricing, where a company sells products below cost to drive competitors out of the market, and refusal to deal, where a firm cuts off business with competitors to weaken them. Practices like loyalty discounts and bundling can also raise concerns if they are designed to exclude equally efficient competitors from the market.
Recent Cases and Key Takeaways
Several recent court cases provide insight into how exclusive dealing claims are evaluated:
In In re Humira Antitrust Litigation (2019), the court ruled that simply developing patents internally does not amount to exclusionary conduct. This case shows that not all competitive restrictions are illegal—some are just part of doing business.
In Sidecar v. Uber (2018), the court dismissed a claim based on the theory that Uber maintained market power through coordination with competitors. This decision underscores the importance of proving actual monopoly power rather than mere dominance in the market.
In Viamedia v. Comcast (2018), the court found sufficient evidence to proceed based on Comcast’s refusal to deal with rivals and willingness to sacrifice short-term profits. This case highlights how courts view exclusionary intent and the importance of proving deliberate efforts to undermine competition.
Exclusive dealing in monopolization claims is a delicate balance between protecting fair competition and allowing legitimate business practices. For a claim to succeed, plaintiffs must demonstrate monopoly power, exclusionary conduct, and harm to competition. Through careful analysis and various legal tests, courts strive to distinguish between healthy competition and conduct that unfairly eliminates rivals. Understanding these legal principles is crucial for businesses navigating the complex world of US antitrust law.