10.2 The Nature of Monopoly

Defining Monopoly and Price Setting

• Monopoly Defined: A monopolist is the single seller of a good or service for which there are no close substitutes and entry by potential rivals is prohibitively difficult. The key characteristics are:

  • Only one seller in an industry.

  • No rivals to that seller.

  • The product is unique with no close substitutes.

  • Substantial barriers to entry lock out potential competitors.

• Price Setting and Monopoly Power: Because a monopolist has the entire market to itself, the market demand is effectively the seller’s firm demand. This downward-sloping demand curve allows the monopolist to select the price and quantity that maximizes profit. Such a firm is called a price setter because it sets its price based on its output decision. A firm that acts as a price setter possesses market power, also known as pricing power or monopoly power. Monopolists, due to their complete absence of rivals, have significantly more market power than firms in more competitive industries. These short-run profits are sustainable in the long run due to barriers to entry.

Sources of Monopoly Power

Economists have identified several conditions that, individually or in combination, can lead to a market being dominated by a single firm by establishing barriers to entry. These barriers prevent potential competitors from entering the market in both the short and long run.

• Economies of Scale:

  • Definition: Economies of scale exist when a firm’s long-run average cost (LRAC) decreases as the firm increases its output.

  • Natural Monopoly: A firm that experiences economies of scale over the entire range of outputs demanded in its industry is called a natural monopoly.

  • How it creates barriers: In industries requiring heavy up-front investment in infrastructure (e.g., water or electricity provision), it is less costly to have one firm serve the market at a very low average cost due to these scale economies. If multiple smaller firms existed, they would operate at higher average costs. An aggressive firm leveraging economies of scale can produce at a significantly lower cost (e.g., producing 240 units at an average cost of 2 on ATC2 compared to 12 smaller firms producing 20 units each at an average cost of 7 on ATC1). This allows the larger firm to undercut rivals' prices, drive them out of business, and deter new entrants, ensuring that the cost savings benefit the monopolist rather than necessarily translating to lower consumer prices.

• Control of Key Inputs:

  • Monopoly power can arise when one firm controls a strategic input essential for production.

  • Example: De Beers Group's historical control over approximately 85% of global rough diamond production through leases and mineral rights in southern Africa allowed it to dominate the diamond market for much of the 20th century. However, new discoveries and the creation of lab-grown diamonds eroded this power, showing how sources of monopoly power can change over time as substitutes emerge or new inputs become available.

• Government Restrictions:

  • Governments can grant special privileges that confer monopoly power.

  • Exclusive Franchises: State and local governments often assign exclusive franchises (rights to conduct business in a specific market) to natural monopolies like cable television, utility companies (electricity, gas, water) to take advantage of economies of scale, often coupled with regulation to ensure lower consumer prices.

  • Encouraging Innovation: Governments use patents (exclusive rights to an inventor for approximately 20 years) and copyrights (protection for creative works for 75 years beyond the artist's life) to encourage innovation. These create temporary monopolies, rewarding creators for their time and effort, without which, rapid competition would eliminate profits and reduce incentives for socially beneficial inventions.

  • Quality of Service/Economic Favors: Government regulations, such as licensing exams for electricians or florists (e.g., Louisiana's florist exam), can restrict entry. While sometimes justified for quality control, these can also serve to confer economic favors on existing producers by creating formidable barriers to entry.

• Switching Costs and Network Effects:

  • Switching Costs: Occur when a consumer faces significant costs (time, effort, financial) in switching from one product to a competing alternative. For example, a user deeply invested in Apple's ecosystem (iTunes, Apple Books, custom emojis) faces a high switching cost to an Android phone, thereby increasing Apple's market power.

  • Network Effects: A good has network effects if its value to each user increases as the number of users increases. Social media platforms like Instagram are prime examples; their value comes from the connections with other users. High network effects create formidable entry barriers because new platforms struggle to attract users unless they can convince an entire network of friends to switch simultaneously. This also demonstrates how market power can be sustained and strengthened over time as a product's user base grows.