课程课程名称︰经济学原理与实习二 课程性质︰必修(可兼通识) 课程教师︰张清溪 开课学院：财金系 经济系 开课系所︰社会科学院 考试日期（年月日）︰98/03/16 考试时限（分钟）：30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、单选题(78%, 每题六分) 1) A competitive firm sells its output for $45 per unit. The marginal product of the 30th worker is 4 units of output per day; the marginal product of the 31th worker is 3 units of output per day. The firm pays its worker a wage of $150 per day. A) For the 30th worker, the value of the marginal product of labor is $600. B) For the 30th worker, the marginal profit is $180. C) For the 31st worker, the marginal profit is $135. D) None of the above is correct. 2) Which of the following events could increase the demand for labor? A) a decrease in output price. B) All of the above are correct. C) an increase in the marginal productivity of workers D) a decrease in the amount of capital available for workers to use 3) Bill is trying to convince the owner of a pizza shop to hire him. He argues that he could help the shop sell an additional five pizza per day at the market price of $8 each. If the facts are not in dispute, but the owner does not hire him, then A) the wage rate must be less than $8 per day. B) the wage rate must be more than $40 per day. C) the wage rate must be less than $40 per day. D) hiring Bill would involve a negative marginal product. 4) Suppose that eight workers can manufacture 70 radios per day, and nine workers can manufacture 90 radios per day. If radios can be sold for $10 each, the value of marginal product of the ninth worker is A) $200. B) $900. C) 90 radios. D) 20 radios. 5) When deciding whether to hire an additional workers, firm look at how the additional worker would affect A) revenue only B) costs only. C) profit. D) output only. 6) When a firm experiences diminishing marginal product, what is the shape of the curve that represents the value of the marginal product of labor? A) upward sloping B) U-shaped C) flat D) downward sloping 7) Goods that go into inventory and not sold during the current period are A) counted as intermediate goods and so are not included in current period GDP. B) counted in current GDP only if the firm that produced them sells them to another firm. C) included in current period GDP as consumption. D) included in current period GDP as inventory investment. 8) Anna, a U.S. citizen, works only in Germany. The value she adds to production in Germany is included A) in German GDP, but it is not included in U.S. GDP. B) in U.S. GDP, but it is not included in German GDP. C) in both German GDP and U.S. GDP. D) in neither German GDP nor U.S. GDP. 9) Tyler and Camiile both live in Oklahoma. A new-car dealer in Oklahoma bought a new car from the manufacture for $17,000 and sold it to Tyler for $20,000. Later that year, Tyler sold the car to Camille for $15,000. By how much did these transactions contribute to U.S. GDP for the year? A) $35,000 B) $20,000 C) $17,000 D) $52,000 10) Which of the following items is included in GDP? A) the sale of used goods B) the sale of stocks and bonds C) the sale of services such as those performed by a doctor D) All of the above are included in GDP. 11) A professional gambler moves from a state where gambling is illegal to a state where gambling is legal. Most of his income was, and continues to be, from gambling. His move A) doesn't change GDP because gambling is never included in GDP. B) necessarily decreases GDP. C) necessarily raises GDP. D) doesn't change GDP because in either case his income is included. 12) Which of the following is not included in GDP? A) services such as those provided by lawyers and hair stylists B) production of foreign citizens living in the United States C) the estimated rental value of owner-occupied housing D) unpaid cleaning and maintenance of houses 二、计算简答题(22%) 1) The Hair Cuttery, a new hair dressing salon is ready to start hiring. Table 1 below shows the relationship between the number of hairdressers it hires and the quantity of haircuts it produces. Table 1 __________________________________________ |Number of |Haircuts| Marginal| Marginal| |hairdressers|per day | Product | Revenue | | | | | Product | |____________|________|_________|_________| |______1_____|____8___|_________|_________| |______2_____|___16___|_________|_________| |______3_____|___23___|_________|_________| |______4_____|___29___|_________|_________| |______5_____|___38___|_________|_________| Use Table 1 above to answer the following qusetions. a. (12 points) Suppose the price of haircuts is $8. Complete the Table above. b. (3 points) The Hair Cuttery is an input price-taker. Suppose the wages paid to hairdressers is $40 per day. What is the profit- maximizing number of hairdressers to hire? c. (7 points) Suppose the wage rate rises to $60 per day. (i) What happens to the firm's demand for hairdressers curve? (ii) What happens to the supply of hairdressers curve? (iii) What happens to the profit-maximizing quanity of hairdressers ? --

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