Market Structure Of Cournot Market

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MARKET STRUCTURE:
DEFINITION:
The interrelated characteristics of a market, such as the relative strength & number of buyers and sellers, degree of collusion among them, competition forms & level, extent of product differentiation, and conditions of entry and exit.
TYPES OF MARKET STRUCTURE:
I. Perfect Competition
II. Monopoly
III. Monopolistic Competition
IV. Oligopoly
PERFECT COMPETITION:
Features:
• Large number of firms.
• No barriers to Entry and Exit; low sunk costs required.
• Identical / homogenous product produced by all firms
• Perfectly elastic demand curves for all firms.
• Knowledge & information are perfectly disseminated.
Examples of Perfect Competition:
 Foreign Exchange Markets: Homogenous currency. Traders have access to …show more content…

As number of firms increase, residual demand elasticity, nε, a single firm will have to face, becomes larger accordingly. As n becomes very large, the residual demand elasticity tends to approach negative infinity , & the equation becomes which is the profit-maximizing condition of a price-taking competitive firm.
STACKELBERG MODEL:
This model is similar to Cournot model but output setting happens in a sequential manner. The follower observes the leader’s output and sets its own output level.
Solving Stackelberg Game:
• Using backward induction, starting at setting price to clear the market.
 P = a - b(qL + qF )
• Now the follower decides quantity to maximize his profit given the leader’s choice.
 F = (a - b(qL + qF ) - c) qF
• Take the derivative and set it to 0 to get BR,
 a - bqL - 2bqF - c = 0
 qF* = (a - bqL - c)/2b
• Now we go to the first step, the leader decides output to maximize his profit
 L = (a - b(qL + qF ) - c) qL
• But then, the leader understands the way the follower will respond. So the leader can figure out the follower’s BR. This leads to
 L = (a - b(qL + (a - bqL - c)/2b) - c) …show more content…

GAME THEORY:
It is the process of developing models to study the strategic interaction between two or more players placed in a situation characterized by set rules & outcomes.
• Cooperative Games: Games Characterized by use of binding contracts
• Non Cooperative Games: Games devoid of binding contracts
Dominant Strategy:
An optimal strategy adopted by firms irrespective of what rival firms are doing. If a player has a dominant strategy than all others are dominated, but the converse is not always true. A strictly dominant strategy is always played in equilibrium, and thus strictly dominated strategies never are.
Dominated Strategy:
A strategy is dominated if, regardless of what any other players do, the strategy earns a player a smaller payoff than some other strategy. Hence, a strategy is dominated if it is always better to play some other strategy, regardless of what opponents may do.
Neither Dominant nor Dominated

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