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M07.L05 — Price Discrimination: First, Second, and Third Degree

Module: Module 07 — Monopoly Lesson: L05 of 06 Duration: ~30 minutes Level: Introductory Provenance: OpenStax Principles of Microeconomics 3e | Microeconomics 1e (Medeiros)

Learning Objective

Classify different types of price discrimination and identify Australian examples.

Conditions for Price Discrimination

Requires: 1. Market power (ability to set prices) 2. Ability to segment markets (prevent arbitrage) 3. Different price elasticities of demand across groups

Types of Price Discrimination

First-Degree (Perfect): - Charge each consumer their maximum willingness to pay - Captures all consumer surplus (e.g., auctions, personalized pricing)

Second-Degree: - Prices vary by quantity or version - Examples: Bulk discounts (Costco), software tiers (Basic/Pro)

Third-Degree: - Group pricing based on elasticity - Australian examples: - Student discounts (movies, software) - Seniors cards (public transport) - Regional pricing (textbooks)

Worked Example

University Textbook Pricing

  1. Identify groups: Australian vs international students
  2. Assess elasticity: International students less price-sensitive (visa requirements)
  3. Implement pricing: AU\(100 domestic edition vs AU\)200 global edition
  4. Prevent arbitrage: Different ISBNs, "Not for sale in Australia" labels

Common Misconception

"Price discrimination is always bad for consumers"

While it transfers surplus to producers, some consumers (more price-sensitive groups) may gain access to goods they couldn't afford at uniform pricing (e.g., student discounts).

Key Takeaways

  • Price discrimination requires market power and separable markets
  • First-degree captures all CS; second uses quantity tiers; third targets groups
  • Common in education, software, and travel industries
  • Can increase total output compared to uniform pricing
  • ACCC monitors for anti-competitive cases

Practice

  1. Why can't perfect competition firms price discriminate?
  2. How do airlines prevent arbitrage between business and economy fares?
  3. Is senior pricing on public transport first, second, or third-degree discrimination?

Further Resources

Provenance: OpenStax Principles of Microeconomics 3e | Microeconomics 1e (Medeiros)