1.4. Suppose there are ʼn firms in the Cournot oligopoly model. Let q; denote the quantity produced by firm i, and let Q = 9₁ +...+ In denote the aggregate quantity on the market. Let P denote the market-clearing price and assume that inverse demand is given by P(Q) = a - Q (assuming Q < a, else P = 0). Assume that the total cost of firm i from producing quantity q; is Ci(qi) = cq;. That is, there are no fixed costs and the marginal cost is constant at c, where we assume c < a. Following Cournot, suppose that the firms choose their quantities simultaneously. What is the Nash equilibrium? What happens as n approaches infinity?

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**1.4.** Suppose there are \( n \) firms in the Cournot oligopoly model. Let \( q_i \) denote the quantity produced by firm \( i \), and let \( Q = q_1 + \cdots + q_n \) denote the aggregate quantity on the market. Let \( P \) denote the market-clearing price and assume that inverse demand is given by \( P(Q) = a - Q \) (assuming \( Q < a \), else \( P = 0 \)). Assume that the total cost of firm \( i \) from producing quantity \( q_i \) is \( C_i(q_i) = cq_i \). That is, there are no fixed costs and the marginal cost is constant at \( c \), where we assume \( c < a \). Following Cournot, suppose that the firms choose their quantities simultaneously. What is the Nash equilibrium? What happens as \( n \) approaches infinity?
Transcribed Image Text:**1.4.** Suppose there are \( n \) firms in the Cournot oligopoly model. Let \( q_i \) denote the quantity produced by firm \( i \), and let \( Q = q_1 + \cdots + q_n \) denote the aggregate quantity on the market. Let \( P \) denote the market-clearing price and assume that inverse demand is given by \( P(Q) = a - Q \) (assuming \( Q < a \), else \( P = 0 \)). Assume that the total cost of firm \( i \) from producing quantity \( q_i \) is \( C_i(q_i) = cq_i \). That is, there are no fixed costs and the marginal cost is constant at \( c \), where we assume \( c < a \). Following Cournot, suppose that the firms choose their quantities simultaneously. What is the Nash equilibrium? What happens as \( n \) approaches infinity?
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