第七章测试1.The deadweight loss generated by a perfect-price-discriminating monopoly
A:equals zero. B:is greater than the deadweight loss of a single-price monopoly. C:equals the sum of all lost consumer surplus. D:equals the deadweight loss of a single-price monopoly.
答案:A
2.Monopolistically competitive firms
A:have no market power because they earn zero economic profit. B:have no market power because price equals marginal cost. C:have no market power because of free entry. D:have market power because they can set price above marginal cost. 3.A monopolist faces the inverse demand curve P = 60 - Q. It has variable costs of Q^2 so that its marginal costs are 2Q, and it has fixed costs of 30. The monopoly's maximum profit is
A:510 B:420 C:220 D:370 4.A monopolist faces the inverse demand curve P = 60 - Q. It has variable costs of Q2 so that its marginal costs are 2Q, and it has fixed costs of 30. At its profit maximizing output level, the monopoly's average cost is
A:17 B:15 C:13 D:11 5.If the demand curve a monopolist faces is perfectly elastic, then the ratio of the firm's price to the marginal cost is
A:0 B:1 C:None of the above—the answer cannot be determined. D:2
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