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Suppose two identical firms are competing in Bertrand competition, so that they produce identical goods and compete by choosing prices p1 and p2. Consumer demand

Suppose two identical firms are competing in Bertrand competition, so that they produce identical goods and compete by choosing prices p1 and p2. Consumer demand is:q=12-p

Since both firms produce identical goods, all consumers buy from whichever offers a lower price. If both firms select the same price, half of demand is purchased from each firm. Suppose these are software firms, so that marginal cost c = 0.

(a) In the Nash equilibrium, what is the price, quantity supplied, and profit of each firm?

(b) Suppose the firms are in a repeated game and discount the future at rate Show (with math!) that a Nash equilibrium is possible where firms collude and earn higher profits every period than in the one-shot game. Explain your reasoning.

(c) Suppose the two firms are colluding to earn higher profits. But now a third firm enters, which is in every way identical to the original two firms. However, now, collusion collapses and a price war ensues. How can this be? What does this tell us about the discount rate

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