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M08.L04 — Collusion, Cartels, and the ACCC

Module: Module 08 — Game Theory and Oligopoly Lesson: L04 of 05 Duration: ~30 minutes Level: Introductory Provenance: OpenStax Principles of Microeconomics 3e | ACCC Cartel Guidelines

Learning Objective

Analyze why cartels form and why they often fail.

Types of Collusion

  • Explicit collusion: Formal agreements (e.g., cartels) to fix prices or output. Illegal in Australia under the Competition and Consumer Act.
  • Tacit collusion: Unspoken coordination (e.g., price leadership by a dominant firm).

Cartel Instability

Cartels collapse because: 1. Incentive to cheat: Members can profit by secretly undercutting the agreed price. 2. Detection lag: Cheating isn’t immediately noticed. 3. Punishment: If caught, firms face ACCC fines (e.g., Visy/Amcor cardboard cartel: $36M penalty).

Worked Example: Visy/Amcor Cartel

Scenario: Rival packaging firms conspired to fix prices (2000s). 1. Collusion: Agreed to share markets and raise prices. 2. Defection: One firm secretly offered discounts to gain clients. 3. Outcome: ACCC investigation → massive fines and reputational damage.

Common Misconception

"Cartels are stable because members trust each other."

Cartels fail because trust is undermined by profit motives—the Prisoners' Dilemma in action.

Key Takeaways

  • Cartels are illegal and unstable due to cheating incentives.
  • The ACCC detects and penalizes cartels to protect competition.
  • Leniency policies reward whistleblowers (first to confess avoids fines).
  • Tacit collusion is harder to regulate but still harmful.

Practice

  1. Why might a firm join a cartel despite the risks?
  2. How does the ACCC’s leniency policy destabilize cartels?
  3. Compare explicit and tacit collusion.

Further Resources

Provenance: OpenStax Principles of Microeconomics 3e | ACCC Cartel Guidelines