课程名称︰经济学(一) 课程性质︰选修兼A5通识 课程教师︰李晓云 开课学院： 开课系所︰ 考试日期（年月日）︰2013.01.11 考试时限（分钟）： 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 一、(13%)假设你在考虑二种电信公司手机资费方案，方案一，统一超商电信每月固定支付 177元，每分钟再收费6.6元；方案二，中华电信每月固定支付183元，每分钟再收费 4.8元。你每月使用手机打电话之需求为Q(D)=450-15P，其中P为每分钟价格，Q为每月 讲电话时间（分钟）。 (1) 在这二种资费方案下，你每月各会打几分钟电话？(4%) (2) 在这二种资费方案下，你的消费这剩余各为多少？请绘图说明并计算出数值。(6%) (3) 你会选择种资费方案，为什麽？ 二、(14%)Answer the folloint questions based on the graph (以Price为纵轴、Quantity为横轴，图中有两条线，supply跟demand，supply线通过 　　 (10,90)、(0,50)两点，demand线通过(0,150)、(25,0)两点) (1) At the equilibrium price, what is the magnitude of the producer surplus?(3%) (2) If the government imposes a price floor of $120 in this market, how much consumer surplus will be in the market?(3%) (3) If the government imposes a price ceiling of $70 in this market, then how much consumer surplus will be in the market?(3%) (4) Explain why the graph that is shown verifies the fact that the market equilibrium(quantity) maximizes the sum of producer and consumer surplus.(5%) 三、(15%)政府为了激发地方特色产业创新转型，提升其商品附加价值与整体产业竞争优势 　　，提出〔地方特色产业辅导计画〕，每案政府补助上限50%。假设政府以税收来支应补 　　贴，而每案平均下来，政府对业者每一商品补贴$3。 (1) 请绘图说明这对消费者剩余、生产者剩余、及总剩余的影响？(10%) (2) 补贴是否会造成无谓损失，请说明之。(5%) 四、(16%)Suppose that a maraket is described by the following supply and demand equations: Q(S)=2P，Q(D)=500-3P (1) Solve for the equilibrium price and the equilibrium quantity.(4%) (2) Suppose that a tax of T is placed on sellers, so the new supply equation is Q(S)=2(P-T). Solve for the new equilibrium. What happens to the price received by sellers, the price paid by buyers, and the quantity sold?(6%) (3) Solve for tax revenue and deadweight loss as a function of T.(6%) 五、(19%)Use the graph to answer the following questions about textile. (以Price为纵轴、Quantity为横轴，图中有三条线，Domestic supply通过(0,2)、 (65,15)，Domestic demand通过(0,22)、(50,12)，World price是P=15的水平线) (1) What is the quantity of textile exported after trade is allowed?(3%) (2) What are the changes in consumer surplus, producer surplus, and total surplus because of trade?(6%) (3) The government decides to subsidize the export of textile by paying a certain amount for each ton sold abroad. How does it affect consumer surplus, producer surplus, government revenue, and total surplus? Is it a good policy form the standpoint of economic efficiency?(10%) 六、(6%)社会上有100人，每人对路灯的需求曲线皆为如下图所示，每一支路灯的成本为 100，请问社会最适的路灯供给量是多少？请写出计算过程。 　　(以Price为纵轴、Quantity为横轴，需求曲线通过(0,10)、(10,0)两点) 七、(6%)请以公有资源说明政府高速公路收费方式从收费站收费改为高速公路匝道按里程 收费对社会福利有何影响？有人说政府这样的做法是在跟民众抢钱，你觉得呢？ 八、(11%)Please answer the following questions: (1) Explain why the average total cost curve is U-shaped?(5%) (2) If the city government implements a lump-sum tax of NT$3,000,000 on each producer of cars. Which of the following curves- average fixed cost, average varibale cost, average total cost, and marginal cost- would shift as a result of the lump-sum tax? Why? Show this in a graph.(6%) --

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