Chapter 12 - Efficiency and Public Policy: Chapter 12 Study Notes

Chapter 12: Economic Efficiency and Public Policy

12.1 Productive and Allocative Efficiency

Economic efficiency is a central concept in microeconomics, referring to the optimal use of resources to maximize output and welfare. This section distinguishes between productive and allocative efficiency and explains their roles in different market structures.

• Productive Efficiency: Occurs when goods are produced at the lowest possible cost. For a firm, this means choosing the least-cost production method for a given output. For an industry, productive efficiency requires that marginal cost ($MC$) is equalized across all firms.

• Allocative Efficiency: Achieved when the output of each good is such that its market price ($P$) equals its marginal cost ($MC$). This ensures resources are allocated to produce the mix of goods most valued by society.

• Examples of Inefficiency:

  1. Firms do not use the least-cost method of production.

  2. Marginal cost is not the same for every firm in an industry.

  3. Too much of one product and too little of another is produced.

• Production Possibilities Boundary (PPB): Any point on the PPB is productively efficient; points inside the curve are inefficient.

Key Formulas

• Productive Efficiency: $MC_1 = MC_2 = \ldots = MC_n$ (across all firms)

• Allocative Efficiency: $P = MC$

Example

If a firm produces widgets using the least-cost method and the industry equalizes marginal cost across all firms, the economy operates on the PPB, maximizing output.

Allocative Efficiency and Total Surplus

Allocative efficiency is closely linked to the concept of total surplus, which is the sum of consumer and producer surplus in a market.

• Consumer Surplus: The area under the demand curve and above the market price line.

• Producer Surplus: The area above the supply curve and below the market price line.

• Perfect Competition: Maximizes total surplus, achieving allocative efficiency at equilibrium quantity $Q^*$ and price $p^*$.

• Monopoly: Restricts output below the competitive level, creating a deadweight loss (sum of areas not realized as surplus).

Key Formula

• Total Surplus: $\text{Total Surplus} = \text{Consumer Surplus} + \text{Producer Surplus}$

Example

In a competitive market, equilibrium occurs where $S = MC$ and $D = MV$ (marginal value), maximizing total surplus. In monopoly, output is restricted, and deadweight loss occurs.

Which Market Structures Are Efficient?

Market structure affects the degree of productive and allocative efficiency.

• Perfect Competition:

  • Long-run equilibrium: Firms produce at the lowest point on their long-run average cost (LRAC) curve.

  • All firms equate $MC$ to price, so the industry is productively efficient.

  • Price equals marginal cost, resulting in allocative efficiency.

• Monopoly:

  • Monopolist operates on its LRAC curve (productive efficiency).

  • Price is greater than marginal cost ($P > MC$), so monopoly is not allocatively efficient.

• Monopolistic Competition and Oligopoly:

  • Firms operate on LRAC curves (productive efficiency).

  • Industry-wide productive efficiency is uncertain due to differentiated products and lack of a single price.

  • Price exceeds marginal cost ($P > MC$), so allocative efficiency is not achieved.

Allocative Efficiency and Market Failure

Market failure occurs when market economies do not produce efficient outcomes. Externalities are a common cause, where costs or benefits affect parties not involved in the transaction.

• Externalities: Economic costs or benefits for parties external to the transaction (e.g., pollution, public goods).

12.2 Economic Regulation to Promote Efficiency

Regulation of Natural Monopolies

Natural monopolies arise in industries with significant economies of scale, where one firm can supply the entire market most efficiently.

• Natural Monopoly: An industry where economies of scale are so large that only one firm can operate efficiently at minimum cost.

• Crown Corporations: In Canada, government-owned firms that may be used to address natural monopoly situations.

• Regulation Methods:

  • Marginal-Cost Pricing: Price is set where the demand curve and marginal cost curve intersect ($P = MC$). This is allocatively efficient but may result in losses for the monopoly.

  • Two-Part Tariff: Customers pay a fixed fee for access and a per-unit price for consumption, allowing the monopoly to cover costs.

  • Average-Cost Pricing: Price is set just high enough to cover total costs ($P = AC$), resulting in no profit or loss but not allocative efficiency if $AC > MC$.

Key Formulas

• Marginal-Cost Pricing: $P = MC$

• Average-Cost Pricing: $P = AC$

Example

Electric utilities often operate as natural monopolies. Regulators may set prices using marginal-cost or average-cost pricing, or implement two-part tariffs to ensure efficiency and cost recovery.

Regulation of Oligopolies

Oligopolistic industries are often subject to skepticism regarding the effectiveness of regulation. Recent trends favor deregulation and privatization due to:

• Regulation reducing competition

• Unclear efficiency of public ownership

• Globalization increasing international competition

12.3 Canadian Competition Policy

The Evolution of Canadian Policy

Competition policy aims to prevent the acquisition and exercise of monopoly power. In Canada, such policy has evolved since the late 19th century.

• Illegal Activities (by 1950s):

  1. Price-fixing agreements that unduly lessen competition

  2. Mergers or monopolies detrimental to public interest

  3. "Unfair" trade practices

Recent Reforms

The Competition Act was amended in 2009 to strengthen enforcement and adapt to new market realities.

• Increased penalties for deceptive marketing and restitution for victims

• More effective criminal prosecution of cartel agreements

• Two-stage merger review process for efficiency

• Monetary penalties for abuse of dominant market position

Future Challenges

Globalization presents new challenges for competition policy:

• Defining markets internationally as goods and services cross borders

• Firms may relocate to countries with lax competition policy, incentivizing policy standardization

Table: Review of Four Market Structures

Market Structure	Main Characteristics
Perfect Competition	Many firms, identical products, free entry/exit, price takers, $P = MC$, efficient allocation
Monopolistic Competition	Many firms, differentiated products, some price-setting power, free entry/exit, $P > MC$, not allocatively efficient
Oligopoly	Few firms, interdependent pricing, barriers to entry, products may be identical or differentiated, $P > MC$, efficiency uncertain
Monopoly	Single firm, unique product, high barriers to entry, price maker, $P > MC$, deadweight loss, not allocatively efficient

Additional info:

• Pareto efficiency is achieved when no one can be made better off without making someone else worse off.

• Deadweight loss is a measure of lost welfare due to market inefficiency, often illustrated in monopoly and externality cases.