来源: 台大黄贞颖老师98年考古题 科目:个题经济学 问题: 1. Every weekend, Eliette goes to an amusement park (FunLand) and spends her entire budget of $40. There are only two things she spends her money on there: roller coaster cost $3/ride and ice cream cost $2/cone, Eliette buys 8 rides and 8 cones. (a)(10 points) In week 2, the FunLand changes its price to $2/ride and $3/cone. Is it possible for Eliette to be strictly worse off? Is it possible for Eliette to be strictly better off? Could she be exactly as well off as before (indifferent)? Explain. In week 3, FunLand changes its prices back to $3/ride and $2/cone (the same as in week 1). But a new amusement park, Bob's wonderland, opens. At Bob's wonderland, roller coaster rides and ice cream cones both cost $2. If Eliette went there, she would buy 15 rides and 5 cones. To compete, FunLand offers the following promotion: any customer who spend at least $40 will get $15 worth of free coupons to spend on either roller coaster rides or ice cream cones. (b)(15 points) Would Eliette rather go to FunLand or to Bob's wonderland? Explain. 我的想法: 虽然分别知道两小题的预算限制， (a) 3x+2y=40 2x+3y=40 (b) 2x+2y=40 3x+2y=55 但是在题目没有告知效用函数的情况下， 不知道该怎麽样找出，她会比较分别偏好哪个;; 麻烦板友解答了 谢谢:) --

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