经济学作业5

经济学作业5
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Principles of Economics I (Fall 2009) Homework #5 (Lecture 10-11, Due on Dec. 30, 2009, submitted in class) Section 1: Textbook Exercises (All numbers refer to “Problems and Application” part in each chapter) Ch13: 2, 3, 8, 9, 11, 12 Ch14: 2, 5, 7, 8*, 11, 12, 13 (*Hint: For simplicity, consider the rise of oil price increased the marginal cost of boat-making in a same amount for each additional product.) Section 2: Supplemental Questions (Multiple choice question if marked with a-d, otherwise True/False questions.) (For Chapter 13) 1. Adam Smith's example of the pin factory demonstrates that economies of scale result from specialization. (For Chapter 14) 2. The Wheeler Wheat Farm sells wheat to a grain broker in Seattle, Washington. Since the market for wheat is generally considered to be competitive, the Wheeler Farm a. does not choose the quantity of wheat to produce. b. does not have any fixed costs of production. c. is not able to earn an accounting profit. d. does not choose the price at which it sells its wheat. 第三部分:其他补充题目 (改编自 2003 年期末考试题,需要用到第 13-14 章的知识) 假定住房市场上有两类供给商,一类是“经济适用房”的供给商;由于政府通过提供廉价土 地对他们进行补贴,他们的边际成本恒定为 c1。另一类是“商品房”的供给商,他们的边际 .. 成本恒定为 c2,满足 c2>c1。住房市场的需求曲线满足普通的向下倾斜的形状。第一类供给 .. 商是需要政府认可的,因此数量有限,远不能满足所有市场需求,第二类供给商潜在地有许 多。 (1)假定无论是“经济适用房”还是“商品房” ,都在一个竞争的市场上销售。画出住房市 场的供求曲线。标出市场均衡点,均衡价格是多少? (2)政府突然提供更多但数量仍然有限的廉价土地给经济适用房的供给商。市场上均衡的 住房数量和价格如何变化? (3) 现在,政府要求“经济适用房”的销售价格必须等于其边际成本,而且向政府指定的 低收入者销售。但在销售之后,允许低收入者转售得到的住房。和完全由市场配置住 房相比,政府的这一做法能否改变住房最终的归属?相反的,假定政府不允许低收入 者转售,会带来什么问题? (4) 政府认为,提供经济适用房“增加了住房市场供给,平抑了住房市场价格,让低收入 者受益” 。根据你对前面所有问题的回答,评论这句话。

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