The price in a market is dominated by two firm is affected by the quantities supplied by both firms, Q1 and Q2: P = 120 - (Q1 + Q2). The marginal cost for the two firm is identical and constant and equal to 20.
a. Derive the equations for total revenue for the two firms.
b. Compute the profit-maximizing levels of output and prices for the firms.
c. Compute the profit-maximizing level of output and price for the industry if the duopolists merged and formed a monopoly.