Oligopoly is a market structure where a few large firms dominate supply of a homogeneous or differentiated product, with significant barriers to entry and interdependent pricing decisions.
## Core concept
In an oligopoly, typically 2–10 major firms control the bulk of market output. Each firm's actions directly affect competitors' strategies—this mutual interdependence is the defining feature. Firms compete through price, product differentiation, advertising, and capacity rather than operating independently.
Key characteristics: - Few large sellers with significant market power - High barriers to entry (capital requirements, brand loyalty, patents, economies of scale) - Homogeneous products (e.g. steel, cement) or differentiated (e.g. automobiles, mobile phones) - Non-price competition (advertising, brand building, R&D) - Interdependent decision-making; one firm's output/price affects others - Firms may engage in collusion or engage in strategic games
Examples relevant to India: - Cement industry (UltraTech, Ambuja, Dalmia) - Automobile sector (Maruti, Hyundai, Tata Motors) - Mobile telecom (Jio, Airtel, Vodafone-Idea) - Steel (Tata Steel, JSW, SAIL)
## Comparison with other structures
| Aspect | Perfect Competition | Monopolistic Competition | Oligopoly | Monopoly | |--------|---|---|---|---| | Number of firms | Many | Many | Few | One | | Product type | Homogeneous | Differentiated | Homogeneous/Differentiated | Unique | | Price control | None | Some | Significant | Complete | | Barriers to entry | None | Low | High | Very high | | Interdependence | No | Minimal | High | N/A | | Long-run profit | Normal | Normal | Supernormal possible | Supernormal |
## Pricing and output decisions
Non-collusive oligopoly (e.g. Cournot, Bertrand models): - Each firm assumes competitors' output/price is fixed - Output lies between perfect competition and monopoly levels - Price lies between competitive and monopoly levels - Result: firms earn supernormal profit but face uncertainty
Collusive oligopoly (cartels): - Firms agree on price, output, or market share - Acts like a monopolist to maximize joint profit - Example: OPEC (oil-producing nations) - Legally prohibited under competition law in India (Section 3, Competition Act 2002)
Kinked demand curve model: - Explains price rigidity in oligopolies - Firms believe rivals match price cuts but ignore price increases - Creates a "kink" in demand curve at existing price - Results in sticky/rigid prices even with cost changes
## Common exam applications
- Case analysis: Identify whether an industry is oligopolistic based on firm concentration, barriers, and interdependence.
- Regulatory perspective: Understand why competition authorities monitor oligopolies (abuse of collective dominance under Section 3(4), Competition Act 2002).
- Business strategy: Explain why oligopolists invest heavily in R&D, brand advertising, and product differentiation.
- Price comparison: Compare oligopoly output and price with perfect competition and monopoly outcomes.
## Worked example
Scenario: Two cement firms (A and B) each produce 1 lakh tonnes annually at ₹400/tonne. If A raises price to ₹450/tonne while B stays at ₹400, A loses significant sales. If both raise to ₹450, both maintain share and earn higher margin.
Question: Why don't both firms immediately raise prices?
Answer: Mutual fear—A fears B won't match the rise, so A loses customers. B faces similar uncertainty. This interdependence and mistrust prevents cooperative pricing unless collusion (illegal in India) occurs. The kinked demand curve explains why prices remain sticky at ₹400 despite cost pressures.
## Common mistakes
- Confusing oligopoly with monopolistic competition; remember: oligopoly = *few* firms with *high* interdependence and *high* barriers.
- Assuming all oligopolies are identical; distinguish between homogeneous (cement, steel) and differentiated (cars, phones).
- Overlooking collusion's illegality; cartels violate Competition Act 2002 and invite penalties.
- Ignoring barriers to entry as the reason for supernormal profits persistence.