An incumbent firm, Firm 1, faces a potential entrant, Firm 2, with a lower marginal cost. The market demand curve is p=120-q1-q2. Firm 1 has a constant marginal cost of $20, while Firm 2's is $10.
a)What are the Cournot equilibrium price,quantities, and profits if there is no government intervention?
b)To block entry, the incumbent appeals to the government to require that the entrant incur extra costs. What happens to the Cournot equilibrium if the legal requirement causes the marginal cost of the second firm to rise to that of the first firm, $20? (recalculate price,output levels and profits)
c)Now suppose that the barriers leaves the marginal cost alone but imposes a fixed cost. What is the minimal fixed cost that will prevent entry?