Entry Deterrence Game

Definition

An entry deterrence game is a strategic scenario where an incumbent firm takes actions to prevent potential entrants from entering the market. These actions can include setting prices low or making heavy investments to signal commitment and discourage new competitors. The game highlights the strategic interactions between existing firms and potential entrants, where the incumbent's choices affect the entrant's decisions, reflecting the dynamics of competition in sequential games and the concept of subgame perfect equilibrium.

5 Must Know Facts For Your Next Test

1. Entry deterrence games often involve an incumbent firm investing in capacity or engaging in aggressive pricing to create a barrier for potential entrants.
2. The actions taken by the incumbent must be credible; if potential entrants do not believe that the incumbent will follow through, they may still enter the market.
3. This type of game often assumes that the incumbent has more information than potential entrants about market conditions or their own costs.
4. The effectiveness of entry deterrence strategies can depend on factors like market size, potential profits, and the costs incurred by the incumbent.
5. The analysis of entry deterrence games helps illustrate the broader implications of competitive behavior in oligopolistic markets.

Review Questions

• How does an incumbent firm's strategy in an entry deterrence game reflect the principles of sequential games?
  • In an entry deterrence game, an incumbent firm anticipates the moves of potential entrants, illustrating strategic decision-making over time. This is characteristic of sequential games, where players make decisions one after another, considering not just their immediate payoffs but also future implications. The incumbent's choice to set low prices or invest heavily is a forward-looking strategy aimed at dissuading entry based on expected reactions from potential competitors.
• Discuss how subgame perfect equilibrium applies to entry deterrence games and its relevance in predicting outcomes.
  • Subgame perfect equilibrium is crucial in entry deterrence games because it ensures that players' strategies are optimal at every possible decision point. For the incumbent, this means that their strategy to deter entry must be credible and sustainable throughout the game. If the incumbent’s actions are consistent and rational in every subgame, then it can effectively deter entry. This concept allows us to analyze how potential entrants will react to incumbent strategies and helps predict whether they will choose to enter or stay out of the market.
• Evaluate the long-term implications of successful entry deterrence for both incumbents and potential entrants within an industry.
  • Successful entry deterrence can solidify an incumbent’s market power, leading to higher long-term profits and reduced competition. However, if a potential entrant perceives these deterrent strategies as too costly or risky, they may choose not to enter, potentially stifling innovation and consumer choice in that industry. On a broader scale, this dynamic can influence market structures, leading to oligopolistic environments where few firms dominate, thus affecting pricing strategies and economic welfare for consumers over time.

Related terms

Subgame Perfect Equilibrium:

A refinement of Nash equilibrium applicable in extensive-form games, where players' strategies form a Nash equilibrium in every subgame.

Incumbent Firm: A firm that is already operating in a market, potentially using its resources and strategies to deter new competitors.

Signaling:

The action taken by one party (typically the incumbent) to convey information about their strength or intentions to influence the behavior of others (like potential entrants).