AP微观经济学市场结构部分20道精华题目（傅莹老师）
Questions 1-2 refer to the graph below
1. If the firm produces 10 units of output, its economic profits will equal (2012,第8题，AP微观, Answer: B)
(A) 0
(B) $50
(C) $100
(D) $150
(E) $200
2心情不爽想发泄的句子dowhile. Which of the following is most likely to occur if 羊腿的家常做法the firm increas production beyond 10 units? (2012,第9题，AP微观, Answer: C)
(A) Consumers would be willing to purcha赌博的危害 more than 10 units at the price of $20 per unit
(B) The firm would definitely experience a loss.
(C) The firm would have to lower its price to ll more than 10 units.
(D) The firm’s average cost of production would initially increa.
(E) The firm’s profits would increa.
3. Which of the following statements about a constant-cost perfectly competitive industry in long-run equilibrium must be true? . 重生之编剧人生(2012,第10题，AP微观, Answer: A怎么筛选)
(A) An increa in demand will cau no change in the long-run equilibrium price.
(B) An increa in demand will cau no change 6123结构in the long-run equilibrium quantity.
(C) The long-run supply curve is upward sloping.
(D) The long-run supply curve is perfectly inelastic.
(E) The total cost of production remains the same as output increas.
4. In which of the following market structures do firms recognize their mutual interdependence? (2012,第11题，AP微观, Answer: A)
(A) Oligopoly
(B) Monopoly
(C) Perfect competition
(D) Unregulated natural monopoly
(E) Monopsony
5. Assume that a profit-maximizing firm is perfectly competitive in both the output and the factor Markets and is at its long-run equilibrium. The firm’s output is 100 units, its total revenue is $600.00, and the fixed cost of production is $50.00. Bad on this information, which of the following is true for the firm? (2012,第12题，AP微观, Answer: E)
(A) Its marginal cost is $5.50, and its average total cost is $5.50.
(B) Its marginal cost is $5.50, and its average variable cost is $5.50.
(C) Its marginal cost is $6.00, and its average total cost is $5.50.
(D) Its marginal cost is $6.00, and its average fixed cost is $5.50.
(E) Its marginal cost is $6.00, and its average你是谁英语怎么说 variable cost is $5.50.
6. Within the range of market demand, which of the following is consistent with the conditions? of a natural monopoly? (2012, 第21题，AP微观, Answer: C)
(A) Long-run total cost decreas as output increas.
(B) Long-run average total cost remains constant as output increas.
(C) Long-run average total cost decreas as output increas.
(D) Marginal cost exceeds average cost.
(E) Setting price equal to marginal cost will maximize profits.
7. A constant-cost, perfectly competitive gadget industry is in long-run equilibrium. An increa in the number of consumers of gadgets will most likely result in (2012,第23题，AP微观, Answer: D)
(A) higher short-run and long-run prices for gadgets
(B) reduced short-run profits, followed by the exit of some firms
(C) an upward shift in all short-run cost curves, followed by a higher long-run price for gadgets
(D) a higher short-run price for gadgets, followed by an increa in the quantity produced
(E) a decrea in the demand for gadgets, followed by a decrea in the supply of gadgets
8. The profit-maximizing firm depicted in the graph above should (2012,第24题，AP微观, Answer: A)
(A) exit if conditions do not improve in the long run
(B) produce the output that minimizes average total cost
(C) increa price to maximize profits
(D) increa output to maximize profits
(E) u less capital and more labor to reduce cost
9. The graph above shows the short-run cost curves of a firm in a perfectly competitive market. Which of the following are true at the firm’s profit maximizing output level? (2012,
第38题， AP微观, Answer: C)
I. Price exceeds average total cost.
II. Economic profits are zero.
III. Marginal cost equals average total cost.
IV. New firms are likely to enter the market in the long run.
(A) I and II only
(B) I and III only
(C) I and IV only
(D) II, III, and IV only
(E) I, II, III, and IV
10. Which of the following best describes an oligopolistic market? (2012,第39题， AP微观, Answer: C)
(A) Many llers with identical products and no barriers to entry
(B) Many llers, each with a clearly differentiated product, and no barriers to Entry
(C) A few competing llers with similar products and high barriers to entry
(D) A few competing llers of identical products and no barriers to entry
(E) No competition among llers and high barriers to entry
11. The payoff matrix below shows the per-unit profits associated with the production strategies of two utility companies, UA and UB. Each firm has two choices: to reduce production by 10 percent or by 20 percent. The first entry in each cell indicates the profits to UA, and the cond, the profits to UB. (2012,第39题， AP微观, Answer: B)
