课程名称︰个体经济学一 课程性质︰必修 课程教师︰黄景沂 开课学院：社会科学院 开课系所︰经济系 考试日期（年月日）︰100.10.31 考试时限（分钟）：50 min 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : Note: You have to provide explanations for all of your answers. 1.Anne's utility on beef(X) and pork(Y) can be expressed as u(x,y)=(x+1)(y+1)^2. (a)(10%)What is Anne's marginal rate of substitution between beef and pork when she consumes x units of beef and y unit of pork? (b)(10%)Is Anne's preference on beef and pork convex? Why? (c)(20%)Suppose that Anne spends 300 dollars on beef and pork every month. The price of beef is $10, and the price of pork is $5. How much beef and pork does she consume in a month? 2.(10%)Assume that Taiwanese produces both industrial and agricultural products more cheaply than Chinese can. Do Taiwanese benefit from trading with China? 3.(10%)Kelly has received $1000 from her parents to help her expenses at college. She has narrowed her choices of how to spend the money to three: a new book, a dinner out with a friend, a pair of new shoes. The price for each of theses three choices is exactly $1000. Suppose that she likes the shoes best and the book least. What is her cost of buying the shoes? 4.(10%)Suppose that an excise tax of $10 per apple would cause the price of apples to rise from $30 apiece to $37 apiece. What would be the effect of a sales tax of $10 per apple on the price of apple? 5.(10%)If the price of coffee rises, will peoples' tastes shift away from coffee and toward other things? 6.(20%)If the supply curve for houses in Taipei is perfectly vertical, how will an excise tax affect the market price of houses? What about a sales tax? ----- --

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