The kinked demand curve is an economic theory that explains why prices in oligopoly markets often remain stable even when costs or demand conditions kinked demand curve. It highlights how firms’ pricing decisions depend heavily on expected reactions from their competitors.
Kinked Demand Curve
This concept is especially useful for understanding markets where a small number of firms dominate and closely monitor each other’s behavior.
Basic Idea of the Kinked Demand Curve
The model assumes a specific pattern of competitor behavior:
- If one firm raises its price, competitors will not follow, causing a loss of customers for that firm.
- If one firm lowers its price, competitors will match the reduction, preventing it from gaining significant market share.
Because both price changes lead to unfavorable outcomes, firms tend to keep prices unchanged.
Why It Is Called a “Kinked” Curve
The demand curve has a sharp bend (or kink) at the current market price.
- Above the current price: demand is highly elastic, meaning customers quickly switch to competitors if prices rise.
- Below the current price: demand is less elastic, because competitors match price cuts.
This difference in elasticity creates a visible “kink” in the curve at the prevailing price level.
Result: Price Stability
One of the most important outcomes of the kinked demand curve is price rigidity.
Even when:
- production costs change
- demand increases or decreases
- economic conditions shift
firms often avoid changing prices because both raising and lowering prices can reduce profits.
Real-World Example: Fuel Stations
Imagine several fuel stations in the same city:
- If one station increases prices, customers immediately go to competitors.
- If one station reduces prices, others quickly match the change.
As a result, fuel prices tend to stay very similar across stations for long periods.
Key Assumptions of the Model
The kinked demand curve is based on several assumptions:
- The market has a few dominant firms (oligopoly)
- Firms are aware of each other’s pricing strategies
- Price changes trigger predictable reactions
- Firms prefer stable prices over risky competition
Limitations of the Theory
Although useful, the model has limitations:
- It does not explain how the initial price is determined
- It ignores cooperation or collusion among firms
- It may not apply in highly innovative or fast-changing markets
- It is difficult to prove empirically in all real-world cases
Conclusion
The kinked demand curve explains why prices in oligopolistic markets often remain stable despite changes in costs or demand. It shows how firms’ expectations about competitor behavior lead to cautious pricing decisions and long periods of price stability.