The following table shows the demand curve facing a monopolist who produces at a constant marginal cost of $10.
Price Quantity
27 ..........0
24 ..........2
21 ..........4
18 ..........6
15 ..........8
12 ..........10
9 ...........12
6 ...........14
3 ...........16
0 ...........18
a. Calculate the firm's marginal revenue curve.
b. What are the firm's profit-maximizing output and price? What is its profit?
c. What would the equilibrium price and quantity be in a competitive industry?
d. What would the social gain be if this monopolist were forced to produce and price at the competitive equilibrium? Who would gain and lose as a result?