Unit 11: Monopoly and Competition Policy – Study Notes

Monopoly and Competition Policy

Introduction to Monopoly

A monopoly is a market structure where a single firm is the sole seller of a good or service with no close substitutes. Monopolies arise due to significant barriers to entry, which prevent other firms from entering the market. As a result, the monopoly's demand curve is the same as the market demand curve.

• Definition: A monopoly exists when one firm is the only provider of a product or service without close substitutes.

• Barriers to Entry: These are obstacles that prevent new competitors from easily entering an industry or area of business.

• Market Demand: The monopolist faces the entire market demand curve.

Barriers to Entry

Barriers to entry are crucial for the existence and persistence of monopolies. They include:

1. Economies of Scale: When the minimum efficient scale of production is large relative to market demand, a single firm can supply the entire market at a lower cost than multiple firms. This is known as a natural monopoly.

2. Government Regulations: Licenses, patents, copyrights, and public franchises can legally prevent entry. Sometimes, the government itself operates as a monopoly through a state-owned enterprise (SOE) or crown corporation.

3. Ownership of Resources: Exclusive control over essential resources (natural, human, or knowledge) can create monopoly power. Examples include amusement park concessions or stadium merchandise rights.

Monopoly Demand and Marginal Revenue

Because the monopoly is the only firm, its product demand (d) equals the total market demand (D). The monopolist's marginal revenue (MR) is always less than the price due to the downward-sloping demand curve.

• Key Point: For firms with market power, MR < P.

Profit Maximization for Monopolies

Monopolies maximize profit by producing the quantity where marginal revenue equals marginal cost (MR = MC).

• If MR > MC: Increasing output raises profit.

• If MR < MC: Reducing output raises profit.

• Profit is maximized at: $MR = MC$

Price Markup

• For a monopoly, Price > Marginal Cost ($P > MC$).

• The difference is called the price markup: $Markup = P - MC$

Profits and Losses in Monopoly

• Profit per Unit: $\frac{\pi}{q} = P - ATC$

• If $P > ATC$, the firm earns a profit per unit and can sustain this in the long run due to barriers to entry.

• If $P < ATC$, the firm incurs a loss per unit and must minimize losses or reduce costs over time.

Example: Calculating Monopoly Price and Quantity

• Suppose: $P = 700 - 2q$, $MC = 6q$, $ATC = \frac{8000}{q} + 3q$

• Find $MR$ by doubling the slope of the demand curve: $MR = 700 - 4q$

• Set $MR = MC$: $700 - 4q = 6q \implies 700 = 10q \implies q = 70$

• Find price: $P = 700 - 2(70) = 560$

• Profit: $\pi = (P - ATC)q = (560 - [\frac{8000}{70} + 3 \times 70]) \times 70 = 16,500$

Welfare Effects of Monopoly

The Price Elasticity of Demand

• The availability of substitutes determines the price elasticity of demand. Fewer substitutes make demand less elastic, increasing monopoly power.

Monopoly and Deadweight Loss

• Monopoly pricing creates a deadweight loss, which is larger than in monopolistic competition or oligopoly.

• Deadweight loss represents the reduction in total surplus due to the monopoly's output being less than the socially optimal level.

Profits and Production Efficiency

• Monopolies typically earn economic profit (monopoly rent).

• The profit-maximizing quantity is usually less than the minimum efficient scale, so monopolies do not achieve production efficiency.

• It is possible, but unlikely, for a monopoly to maximize profit at the minimum efficient scale.

Monopoly Inefficiency

• Monopolies charge a markup ($P > MC$), meaning the value to consumers of the last unit exceeds the resource cost of production.

• Monopolies often do not produce at the minimum average total cost ($MC \neq ATC_{min}$).

• Monopolies can earn positive economic profits in the long run, leading to inefficient allocation of investment capital.

Competition Policy

• Antitrust laws are designed to prevent the formation of monopolies through mergers and acquisitions.

• Horizontal Integration: When two firms in the same industry merge.

• The Competition Bureau may block mergers if the new firm would have more than 35% market share or if the top four firms have over 65% combined share.

Regulating Monopolies and Oligopolies

Governments intervene in monopolistic and oligopolistic markets to protect consumers and improve efficiency.

• Licensing fees can reduce monopoly profit without affecting marginal cost.

• Price ceilings can force firms to set $MR = P$, increasing consumer surplus and market efficiency.

• In natural monopolies, the government may set price equal to average total cost or operate the firm as a state-owned enterprise.

Federally Regulated Industries

Industry	Regulation Type
Rail	State-owned enterprise for passenger travel; license fees for freight
Air travel	Licenses for airlines
Telecommunications	Licenses and price ceilings on phone, data, TV, radio
Banking & Lending	Price ceilings on service charges and interest

Provincially Regulated Industries

Industry	Regulation Type
Electricity	State-owned monopoly or price controls
Natural Gas	Price ceiling
Water	Municipal monopoly
Public Transportation	Price ceiling
Colleges & Universities	Price ceiling

Monopoly Pricing Strategies

Price Discrimination

Price discrimination is the practice of charging different prices to different customers for the same good or service. It is legal if certain conditions are met:

• The firm has market power.

• The firm can identify customers with different willingness to pay.

• The firm can prevent resale between customers.

Types of Price Discrimination

• Multi-Market (3rd Degree): Different prices for different market segments (e.g., by geography, age, student status). Increases total output and producer surplus.

• Quantity-Based (2nd Degree): Bulk discounts; small quantity buyers pay higher prices.

• Perfect (1st Degree): Each consumer is charged their exact willingness to pay. Rare in practice, but auctions and negotiations approximate this.

Other Pricing Strategies

• Two-Part Tariffs: A membership or entrance fee plus a usage fee. Captures more consumer surplus.

• Junk Fees: Additional processing or administrative charges added to the stated price.

• Price Matching (Low Price Guarantee): Promises to match competitors' prices, which can deter price competition and allow for price discrimination.

• Loss Leaders: Selling a product below cost to attract customers, hoping they will buy other profitable items.

Challenges with Price Matching

• Verification of competitor prices is necessary.

• Firms may not be able to profitably match all competitor prices, especially discounted ones.

Summary Table: Types of Price Discrimination

Type	Description	Example
1st Degree (Perfect)	Each consumer pays their maximum willingness to pay	Auctions, negotiations
2nd Degree (Quantity-Based)	Price varies by quantity purchased	Bulk discounts
3rd Degree (Multi-Market)	Price varies by consumer group	Student/senior discounts, geographic pricing

Additional info: These notes synthesize content from lecture slides and standard microeconomics textbooks to provide a comprehensive overview of monopoly, competition policy, and pricing strategies.