What is a key feature of an oligopoly?

In an oligopoly, a small number of firms dominate the market, which is a defining characteristic of this market structure. Unlike perfect competition, where many firms exist with no single firm influencing the market price, or monopoly, where one firm has complete control, oligopoly exists in a space where several firms have significant market power. This small number of firms means that the actions of one firm can directly impact the decisions and performance of the others, leading to interdependent decision-making. Firms in an oligopoly may engage in tactics such as price-setting, collusion, or forming cartels to maintain their market presence and profits, resulting in less competitive pricing than in more competitive markets. This structure can lead to market outcomes that are more favorable to firms but potentially less so for consumers, as the limited competition may keep prices higher than they would be under perfect competition.