课程名称︰经济学一 课程性质︰必修兼通识 课程教师︰李显峰 开课学院： 开课系所︰工管系、地理系、生传系 考试日期（年月日）︰101/01/07 考试时限（分钟）：三节课(170分) 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : B卷 请在答案卷上先住明使用何种试题，试题不必交回 I.Choice Questions 选择题 (每小题2%，合计60%) 16.Refer to Figure 3.If the ATC=20 at the profit-maximizing level of output, which of the following will occur in the long run in this industry? a. Firms will exit this industry. b. Firms eill enter this industry. c. This firm will continue to earn positive ecconomic profits. d. This firm will incurlosses. 17.Worker who work the night shift(大夜班)are often paid more than those who do identical work on the day shift(白日班). This is referred to as a a. discriminatory wage practice. b. compensating differential. c. wage inequity. d. a market inefficiency. 18.In the prisoner's dilemma game with Bonnie and Clyde as the players,the likely outcome is a. a very good outcome for both players. b. a very good outcome for Bonnie, but a bad outcome for Clyde. c. a very good outcome for Clyde, but a bad outcome for Bonnie. d. a bad outcome for both players. 19.Rosie's Flower Shop sells floral arrangements 花束 for $20 each.If Rosie hires 10 workers, she can sell 600 arrangements per week. If she hires 11 workers, she can sell 650 arrangements per week. Rosie pays each of her workers $400 per week. Which of the following is correct? a. For the 11th worker, the marginal profit is $1,000. b. For the 11th worker, the marginal revenue product is $1,000. c. The firm is maximizing its profit. d. If the firm is employing 11workers, then its profit would increase if it cut back to 10 workers. 20.When an oligopoly market reaches a Nash equilibrium, a. the market price will be different for each firm. b. the firms will not have behaved as profit maximizers. c. a firm will have chosen its best strategy, given the stratfgies chosen by other firms in the market. d. a firm will not take into account the strategies of competing firms. [Question 21 and 22] Table 2.This table shows a game played between two firms, Firm A and Firm B. In this game each firm must decide how much output (Q) to produce: 10 units or 12 units.The profit for each firm is given in table as (Profit for Firm A, Profit for Firm B). Firm B Q=10 Q=12 ＿＿＿＿＿＿＿＿＿＿＿＿ Q=10 (48,48) (20,60) Firm A ＿＿＿＿＿＿＿＿＿＿＿＿ Q=12 (60,20) (38,38) 21.Refer to Table 2. The Nash equilibrium for this game is a. 10 units of output for Firm A and 10 units of output for Firm B. b. 10 units of output for Firm A and 12 units of output for Firm B. c. 12 units of output for Firm A and 10 units of output for Firm B. d. 12 units of output for Firm A and 12 units of output for Firm B. 22.Refer to Table 2. If these two firms play this game repeatedly, the likely outcome will be a. 10 units of output for Firm A and 10 units of output for Firm B. b. 10 units of output for Firm A and 12 units of output for Firm B. c. 12 units of output for Firm A and 10 units of output for Firm B. d. 12 units of output for Firm A and 12 units of output for Firm B. 23.Which of the following characteristics of competitve markets is necessary 绝对必要 for firms to be price takers? (i) There are many sellers. (ii) Firms can freely enter or exist the market. (iii) Goods offered for sale are largely the same. a.(i) and (ii) only b.(i) and (iii) only c.(ii) only d.(i), (ii), and(iii) [Question 24-25] Table 1 Percentage of Before-Tax Income 课税前所得 Received by Families HaHaland: Quintile Share of Income Share of Income Share of Income by Quintile五分 by Quintile五分 by Quintile五分 位,2000 位,2003 位,2007 ＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿ Botton Fifth 4.3% 4.1% 3.4% Second Fifth 9.8% 9.6% 8.8% Middle Fifth 15.5% 15.5% 14.7% Fourth Fifth 22.8% 23.2% 22.8% Top Fifth 47.7% 47.6% 50.3% 24.Refer to Table 1. In 2007, the top fifth of families have a. almost 15 times as much income as the bottom fifth of families. b. 96.6% more income than the bottom fifth of families. c. 50.3% more income than the bottom fifth of families. d. 46.9% more income than the bottom fifth of families. 25.Refer to Table 1. Comparing data from 2000 and 2007, which of the following statements is correct? a. There has been no change in overall income inquality because the share of income held by the fourth fifth is identical. b. Overall income inequality has worsened slightly, as shown by the simultaneous increase in the share of income held by the top fifth and the decrease in the shre of income held by the bottom fifth. c. Overall income inequality has improved because the share held by the middle fifth has declined by almost 1%. d. None of above is corrected. 26.As a gruop, oligopolists would always earn the highest profit if they would a. produce the perfectly competitive quantity of output. b. produce more than the perfectly competitve quanity of output. c. charge the same price that a monopolist would charge if the market were a monopoly. d. operate accroding to their own individual self-interests. 27.When a natural monopoly 自然独占 exist, it is a. always cost effective 成本较低for government-owned firms to produce the product. b. never cost effective for one firm to produce the product. c. always cost effective for two or more private firms to produce the product. d. never cost effective for two or more private firms to produce the product. 28.Monopolistic competition is characterized by which of following attributes 性质? (i) free entry (ii) product differentiation (iii) many sellers a.(i) and (iii) only b.(i) and (ii) only c.(ii) and (iii) only d.(i), (ii), and(iii) 29.A fundamental source of monopoly market power arises from a. perfectly elastic demand. b. perfectly inelastic demand. c. barriers to entry. d. availability of "free" natural resources, such as water or air 30.Patent 专利权 and copyright 版权 laws encourage a. creativity. b. research and development. c. competition among firms. d. Both a and b are correct. II.Essay Questions and Problem 问答计算申论题(需列出计算或推理过程，计40%) 1.(15%)Safety Co. is a monopolist in the doorstop industry. Its marginal cost MC = -5 + 2Q,and market demand is P = 55-2Q, marginal revenue MR = 55 - 4Q. Please find: (1)What price and output should Safety Co.set to maximize profit? (2)What is the deadweight loss 无谓福利损失 from monopoly power if Safety Co. acted like a perfect competitor? 2.(15%)(a double market)Suppose two indentical firms produce a homogeneous good face a linear market demand curve P = 36-Q, where Q is the total production of both firms, i.e. Q = q1 + q2,q1 and q2 are the output of firm 1 and firm 2,respectively. MR = 36-2Q Also, suppose that both firms have zero marginal cost : MC1 = MC2 =0 Each firm maximizes its own profit, and find Firm 1's reaction curve: q1 = 18 - q2/2, Firm 2's reaction curve: q2 = 18 - q1/2, Please find: (1)the Cournot equilibrium quantity of firm 1 and 2, qc1 and qc2,and the equilibrium market price Pc0. (2)the monopoly output Qm and monopoly price Pm. (3)if two firms agree to share profits equally, what output each firm will produce q01 and q02? (4)If it is in a perfect competition market, what is the equilibrium market output Qc and Pc and profitΠ? 3.(10%)For a given firm, the marginal revenue product of labor MRPL= $50 and the marginal revenue product of capital MRPK= $100 while the unit price of labor PL= $10 and the capital service price PK= $20. (1)Is the firm maximizing profits? Why or why not? (2)Identify a specific action that would increase this firm's profits. --

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