# Is the Cournot equilibrium A Nash equilibrium?

## Is the Cournot equilibrium A Nash equilibrium?

The Cournot model of oligopoly assumes that rival firms produce a homogenous product, and each attempts to maximize profits by choosing how much to produce. All firms choose output (quantity) simultaneously. The resulting equilibrium is a Nash equilibrium in quantities, called a Cournot (Nash) equilibrium.

How is equilibrium attained in Cournot Oligopoly model?

In the Cournot model, firms choose quantities simultaneously and independently, and industry output determines price through demand. A Cournot equilibrium is a Nash equilibrium to the Cournot model. With n identical firms, a Cournot industry behaves like a monopoly facing a demand that is n times more elastic.

Why is Cournot equilibrium suboptimal?

The question arises of why the firms choose the suboptimal equilibrium e. The answer is that the Cournot pattern of behaviour implies that the firms do not learn from past experience, each expecting the other to remain at a given position.

### Which cell represents a Nash equilibrium?

Finding Nash Equilibrium If one player has a dominant strategy, the cell in the dominant strategy row or column in which the other player has the maximum payoff is the Nash equilibrium. If no firm has any dominant strategy, identify any dominated strategies and cross those cell out.

What is Nash equilibrium?

The Nash equilibrium is a decision-making theorem within game theory that states a player can achieve the desired outcome by not deviating from their initial strategy. In the Nash equilibrium, each player’s strategy is optimal when considering the decisions of other players.

How to find the Nash equilibrium of the Cournot model?

In Figure 18.1.1, we can see the Nash equilibrium of the Cournot duopoly model as the intersection of the reaction curves. Mathematically this intersection is found by solving the system of equations, q∗ F = A−c 2B − 1 2qN q F ∗ = A − c 2 B − 1 2 q N and q∗ F = A−c 2B − 1 2qF q F ∗ = A − c 2 B − 1 2 q F

## When did Cournot invent the oligopoly model?

This creates a strategic environment where one firm’s profit maximizing output level is a function of their competitors’ output levels. The model we use to analyze this is one first introduced by French economist and mathematician Antoine Augustin Cournot in 1838.

How is a Cournot equilibrium different from a collusive equilibrium?

The difference between this Cournot equilibrium and the collusive one is that each firm adjusts its output independently of the other firm’s output to maximize its profit, whereas under collusion it adjusts its output in conjunction with an agreed-upon equivalent adjustment of the other firm’s output.

Which is an example of a Cournot duopoly?

COURNOT DUOPOLY: an example. COURNOT DUOPOLY: an example. Let the inverse demand function and the cost function be given by P = 50 − 2Q and C = 10 + 2q respectively, where Q is total industry output and q is the firm’s output. First consider first the case of uniform-pricing monopoly, as a benchmark. Then in this case Q = q and the profit