※ 引述《chestnut42 ()》之銘言： : 來源: 台大黃貞穎老師98年考古題 : 科目:個題經濟學 : 問題: : 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. 畫預算線，初始價格時他選擇{8，8} 改變價格後，他也買得起{8，8}的組合 但有更多選擇 所以效用大於等於初始效用 EX U = min {Qr,Qc} 相等 U = Qr^3Qc^2 效用增加 : 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. wonderland 的價格消費{15，5} 此時也消費得起 {8，8} 優於初始funland條件 但若與 3Qr + 2Qc = 55 相比，funland 優惠條件買不起{15，5}的組合 消費40買了{8，8}後，3Qr + 2Qc = 55的限制範圍是{13，8} 與 {8，15.5}的區域 互相有對方買不起的組合 => 無法比較優劣 視效用函數而不同 我是以比較福利的章節來看，不過不太會用電腦畫圖...所以 ... 有錯還請多指教 : 我的想法: : 雖然分別知道兩小題的預算限制， : (a) 3x+2y=40 : 2x+3y=40 : (b) 2x+2y=40 : 3x+2y=55 : 但是在題目沒有告知效用函數的情況下， : 不知道該怎麼樣找出，她會比較分別偏好哪個;; : 麻煩板友解答了 : 謝謝:) --

※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.171.132.152