What is the term for a market in which a single company dominates?

What is the term for a market in which a single company dominates?

• A. Oligopoly
• B. Cartel
• C. Monopsony
• D. Monopoly

Answer: (D)

A single company dominating a market is a monopoly. In a monopoly, one seller has substantial control over the price and the quantity of the product because buyers have few or no close substitutes. High barriers to entry—such as economies of scale, control of essential resources, or regulatory protections—prevent other firms from entering the market, reinforcing that dominant position. Because of this, the monopolist can influence prices and output more easily than in more competitive settings. A classic historical example is Standard Oil, which for a long period controlled much of the oil market before antitrust actions changed the landscape. Understanding how this differs from the other terms helps keep the idea clear: an oligopoly is when a market is ruled by a few firms; a cartel is when firms collude to fix prices or output as if they were a single seller (often illegal); a monopsony is the opposite situation, where there is a single buyer in the market, not a single seller.

A single company dominating a market is a monopoly. In a monopoly, one seller has substantial control over the price and the quantity of the product because buyers have few or no close substitutes. High barriers to entry—such as economies of scale, control of essential resources, or regulatory protections—prevent other firms from entering the market, reinforcing that dominant position. Because of this, the monopolist can influence prices and output more easily than in more competitive settings. A classic historical example is Standard Oil, which for a long period controlled much of the oil market before antitrust actions changed the landscape.

Understanding how this differs from the other terms helps keep the idea clear: an oligopoly is when a market is ruled by a few firms; a cartel is when firms collude to fix prices or output as if they were a single seller (often illegal); a monopsony is the opposite situation, where there is a single buyer in the market, not a single seller.