Unit 4: Market Structures of Imperfect Competition

Monopoly

A market structure where a single firm controls the entire industry and dictates market conditions.

Price Maker

A firm that must lower its price to sell more units, significantly affecting revenue calculation.

Single Seller

Condition in monopoly where one firm controls the entire market.

Unique Product

A characteristic of monopolies where there are no close substitutes for the product.

High Barriers to Entry

Challenges that prevent new firms from entering the market, such as patents or geography.

Marginal Revenue (MR)

Additional revenue generated from selling one more unit of the product.

Demand Curve

A graphical representation showing the relationship between price and quantity demanded.

Total Revenue (TR)

The overall income generated from sales, calculated as TR = P × Q.

Average Revenue (AR)

Revenue per unit sold, which equals the price in monopoly situations.

Profit Maximization

The process of determining the best output level to maximize profit, where MR = MC.

Allocatively Inefficient

A situation where the firm produces less than society wants, resulting in P > MC.

Deadweight Loss (DWL)

The loss in economic efficiency when equilibrium for a good or service is not achieved.

Natural Monopoly

A monopoly that arises due to economies of scale, allowing one firm to supply the market more efficiently.

Socially Optimal Price

Price level set at MC to achieve allocative efficiency, often requiring subsidies.

Fair Return Price

Price set at ATC, allowing the firm to break even without incurring losses.

Price Discrimination

Selling the same product at different prices based on consumer willingness to pay.

First-Degree Price Discrimination

Charging each consumer exactly what they are willing to pay, leading to no consumer surplus.

Monopolistic Competition

A market structure combining elements of monopoly and perfect competition, with many sellers.

Differentiated Products

Products that are similar but not identical, allowing firms some pricing power.

Short-Run Equilibrium

In monopolistic competition, firms can earn economic profits or incur losses in the short run.

Long-Run Equilibrium

In monopolistic competition, firms will adjust entry and exit to reach zero economic profit.

Excess Capacity

The gap between actual output and the output needed to minimize average total cost.

Price vs. Profit Maximization

Mistake of assuming monopolists charge the highest price rather than the profit-maximizing price.

Supply Curve Fallacy

Confusion over the existence of a supply curve for monopolies; monopolists set price based on demand.

Allocative Efficiency

The condition when P equals MC; monopolistic competition does not achieve this efficiency.

Revenue Maximization vs. Profit Maximization

Confusing strategies; profit max occurs at MR=MC, while revenue max occurs at MR=0.