Monopoly Economics: Chapter 15

Comprehensive vocabulary flashcards covering the characteristics, causes, mathematical principles, and public policy implications of monopolies as discussed in Chapter 15.

Monopoly

A firm that is the sole seller of a product without close substitutes, acting as a price maker due to barriers to entry.

Barriers to Entry

The fundamental cause of monopoly power which prevents other firms from entering the market, classified into monopoly resources, government regulation, and the production process.

Natural Monopoly

A type of monopoly where a single firm can supply a good or service to an entire market at a smaller cost than could two or more firms, typically arising from economies of scale over the relevant range of output.

Club Goods

Goods that are excludable but not rival in consumption.

Average Revenue (AR)

Revenue per unit sold, calculated as total revenue divided by quantity ($AR = TR / Q$), which always equals the price ($P$).

Marginal Revenue (MR)

The change in total revenue when output increases by 1 unit ($\frac{\triangle TR}{\triangle Q}$), which for a monopoly is always less than the price of its good ($MR < P$).

Output Effect

The impact on total revenue where revenue increases because quantity ($Q$) is higher.

Price Effect

The impact on total revenue where revenue decreases because price ($P$) is lower.

Profit Maximization for a Monopoly

The production level where marginal revenue equals marginal cost ($MR = MC$), with the price determined by the demand curve at that quantity.

Monopoly Profit Formula

$$Profit = (P - ATC) \times Q$$

Deadweight Loss

The social loss and inefficiency resulting from a monopoly producing less than the socially efficient quantity of output, represented by the triangle between the demand curve and the marginal-cost curve.

Price Discrimination

The rational business practice of selling the same good at different prices to different customers based on their willingness to pay to increase profit.

Perfect Price Discrimination

A situation where a monopolist charges each customer exactly his or her willingness to pay, resulting in the monopoly firm getting the entire surplus and eliminating deadweight loss.

Sherman Antitrust Act (1890)

A law aimed at increasing competition by preventing mergers, breaking up companies, and preventing coordinated activities that make markets less competitive.

Clayton Antitrust Act (1914)

Legislation used to strengthen government powers and prevent companies from engaging in activities that reduce market competition.

Public Ownership

A public policy response to monopoly where the government owns and operates the firm, though it may lack private incentives to minimize costs.