11.11: Stackelberg Competition

The Stackelberg model illustrates a type of oligopoly where a leading firm sets its production quantity, anticipating the reaction of follower firms, who then adjust their own output accordingly. The advantage for the leader in this model stems from being the first mover.

Consider a scenario with two competing electric car manufacturers, SwiftMotors and VelocityAuto. SwiftMotors takes the lead in the market by deciding its production quantity, with the goal of maximizing profits and establishing market dominance. In response to SwiftMotors' decision, VelocityAuto, as the follower, determines its own production level using a reaction function, aiming to optimize its profit while considering the market leader's choice.

SwiftMotors' higher initial production increases market supply, which may lower prices. However, the impact on price isn't definite and depends on the elasticity of market demand. Further, VelocityAuto produces fewer cars as the reaction function. Both companies eventually settle at production levels where neither benefits from changing their output. This balance is called the Stackelberg equilibrium, where the leader gains a competitive edge by moving first, and the follower adjusts to optimize its profit.

This model illustrates the power of making the first move in a competitive market. The leader can influence market conditions and maintain a competitive advantage by making early and strategic production decisions. In response, followers adapt their own strategies to maintain their competitiveness.

The Stackelberg model describes a scenario where one firm takes the role of a quantity leader, deciding its production level first.

While all other firms act as followers, determining their production levels after observing the leader's choice.

The leader might emerge due to its market power, size, reputation, innovative capacity, information, or historical dominance.

For example, consider two firms, Aquaspark and Briskspring, which manufacture the same product.

Aquaspark, the leader, determines its optimal production considering all possible outputs by the follower, Briskspring.

Briskspring, in turn, optimizes its production levels, given all possible initial output levels to which the leading firm might commit. Their reaction functions are shown in the graph.

Aquaspark, the leader, sets its production at QA1, and Briskspring, the follower, responds with QB1 based on its reaction function.

Point E_S represents the Stackelberg equilibrium on the graph, where the leader’s and follower’s production decisions satisfy both firms’ profit-maximizing strategies.

Notably, the leader’s initial decision is considered irreversible because the follower observes it and adjusts its strategy accordingly.

• Stackelberg Model - A type of oligopoly where a leader firm sets initial production.
• Oligopoly - A market structure with a small number of firms dominating.
• Reaction Function - Response of a follower firm to the leader's production decision.
• First Mover Advantage - The edge gained by initiating strategic moves in a market.
• Stackelberg Equilibrium - A state where no firm can benefit by changing its output.

• Define Stackelberg Model – Illustrates a type of oligopoly where a leader firm sets production (e.g., as in our Stackelberg competition example).
• Contrast Leader vs Follower – Explains roles and strategic differences (e.g., SwiftMotors vs. VelocityAuto).
• Explore Stackelberg Competition Examples – Describes real-life market dynamics (e.g., electric car manufacturers).
• Explain Reaction Function – The follower firm's output adjustment in response to the leader.
• Apply in Context – Demonstrates how first mover firms can influence market conditions.

• What is the Stackelberg model and how it depicts oligopolistic markets?
• How does a leader firm's production decision affect the follower's response?
• What is the influence of the Stackelberg equilibrium on market dynamics?

• Economics Students – Understand how Stackelberg competition shapes market structures.
• Educators – Provides a framework to delve into oligopoly and strategic decision-making.
• Market Researchers – Insights into competitive behavior and responses in oligopolies.
• Business Enthusiasts – Offer insights on first mover advantages and strategic market decisions.