課程名稱︰個體經濟學一 課程性質︰必修 課程教師︰古慧雯 開課學院：社會科學院 開課系所︰經濟系 考試日期（年月日）︰98.11.09 考試時限（分鐘）：100 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : 30 points in total. you have to state your reasoning clearly. No point will be given to an unexplained answer. 1.(8 points) Which of the following circumstances might affect the price charged by a young doctor just out of medical school and why? (a) The doctor is heavily in debt due to student loans. (b) The high cost of the X-ray machine that he needs in his office. (c) This doctor has recently been sued for malpractice. His insurance company will cover all the compensation to the patient. Fortunately for him, the public is unaware of the lawsuit, but unfortunately for him, his insurance company decides to raise his insurance fee. (d) It becomes generally known that this doctor's insurance company has raised his fee. __ 2.(10 points) A producer has the following production function: q=√LK The price of factor K is $9 and the price of factor L is $1. (a) In the short run, K is fixed to be 100 units while the quantity of L could be adjusted freely. What's the short-run total cost if 50 units are produced? (b) In the long run, even the quantity of K could be adjusted freely, i. Calculate the marginal product of K. ii. Calculate the marginal rate of technical subsitution MRTS≡|dK/dL|. iii. Let LRAC(q) denote the long-run average cost, what's the sign of dLRAC(q)/dq? iv. What's the long-run cost if 50 units are produced? 3.(4 points) A consumes only two commodities: x and y. His weekly demand for x is: x=I/3Px, where I and Px denote the income and the price of x respectively. (a) Calculate A's income elasticity of x. (b) Calculate A's income elasticity of y. 4.(4 points) B cares about two things: the size of his apartment and the money he could spend on all other things. He bought an apartment a while ago, and the price of real estate fell ever since. How does this price fall affect B's consumption bundle and his utility? 5.(2 points) How do the following events affect the demand for postal service? (For a more detailed story, please see the Economist, 10-31-11/6,2009, PP.67- 68.) (a) The invention of e-mail. (b) More and more e-shop, like PChome線上購物, e-bay etc., appear. 6.(2 points) Consider the following news and analyze why the price of pork went up. 台東關山一處養豬場發現豬隻感染「H1N1」，出現咳嗽及下痢，是否衝擊民眾的 消費信心，影響豬價，引起關注。不過，根據彰化縣肉品市場下午拍賣情形，拍 賣頭數到一千六百七十三頭，與五號的一千七百頭差不多，價格則達到每公斤六 十一點五元，甚至比五號的六十點七八元還要高，豬價似乎沒有受到影響。 彰化縣肉品市場總經理施明哲說，防檢局及專家對外說明，豬肉只要煮熟，沒有 疑慮，民眾對豬肉消費仍具信心，因此價格沒有下跌。 施明哲總經理說，其實進到拍賣市場的豬隻，都要經過檢疫程序，有症狀的豬隻 不可能拍賣，因此民眾可以安心消費。(中廣新聞) 試題結束 --

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