The kinked demand curve is an economic theory that explains why prices in some markets—especially oligopolies—tend to stay stable even when costs or demand conditions kinked demand curve. It focuses on how firms react to each other’s pricing decisions and how that behavior shapes market prices.
Kinked Demand Curve
This concept is most commonly used to analyze industries where a small number of firms dominate and closely watch each other, such as airlines, telecom, and fuel retailing.
Core Idea of the Kinked Demand Curve
The model is based on a simple assumption about competitor behavior:
- If one firm raises its price, competitors will not follow
- If one firm lowers its price, competitors will match the cut
This creates an unusual situation where:
- price increases lead to a large loss of customers
- price decreases lead to only small gains in market share
As a result, firms avoid changing prices.
Shape of the Curve
The kinked demand curve gets its name from its distinctive shape:
- Above the current market price: demand is highly elastic (very sensitive to price increases)
- Below the current price: demand is less elastic (competitors match price cuts)
The point where these two segments meet is called the kink, representing the current market price.
Why Prices Stay Stable
One of the most important outcomes of this model is price rigidity.
Even if market conditions change, firms may keep prices unchanged because:
- raising prices risks losing customers
- lowering prices reduces profits for everyone due to price matching
- neither option is attractive
So, firms prefer to maintain existing prices.
Example: Mobile Network Providers
Consider a city with three major telecom companies:
- If one company increases its plan prices, customers quickly switch to others.
- If one company reduces prices, competitors immediately match the offer.
Because of this mutual reaction, prices remain almost identical for long periods.
Key Assumptions of the Model
The kinked demand curve is based on several assumptions:
- The market is an oligopoly with few large firms
- Firms are aware of their competitors’ behavior
- Price competition is more important than product differentiation
- Firms prefer stability over aggressive price wars
Limitations of the Theory
Although useful, the model has some weaknesses:
- It does not explain how the original price is determined
- It ignores collusion or strategic cooperation
- It may not apply in fast-changing or innovative markets
- It lacks strong real-world measurement in some industries
Conclusion
The kinked demand curve explains why prices in oligopolistic markets often remain stable even when economic conditions change. It highlights how interdependent decision-making among firms can lead to cautious pricing behavior and long periods of price rigidity.
If you want, I can also create a diagram of the kinked demand curve, exam notes summary, or comparison with monopoly and perfect competition models.