Re: [考試] 個經的問題

看板Economics (經濟學)作者doudoulon (當天空落淚)時間14年前 (2011/11/13 00:38)推噓1(1推 0噓 0→)

留言1則, 1人參與討論串2/2 (看更多)

※ 引述《chestnut42 ()》之銘言： : 來源: 台大黃貞穎老師98考古題 : 科目: 個體經濟學 : 問題: : Your TA has utility over books (B) and movie tickets (M) as follows: : u(B,M) = B + lnM . : The price of books and movie tickets is pB=pM=1 and the income devoted by : TA to these goods is 4. : MRS=M=1 : 是不是M固定消費1單位，其他的錢都會用到B上呢？準線型無異曲線求解時要多考慮角解 (M,B)分別等於(1,3).(0(不合,因為M要大於0),4).(4,0) 可知(M,B)=(1,3)時效用最大 : (b)(15 points) Imagine that I decide to give 2 movie tickets to your TA for : free. These coupons cannot be resold. In a clearly labeled diagram : (label : M on the x-axis and B on the y-axis), show your TA's budget set in this : situation. Indicate your TA's chosen consumption of M and B. : (B-2)+M=4, M=1, B=5 買五本書 : 加上贈送的2張電影票，看三場電影這題是說送兩張電影票但不能轉售所以新的預算限制線為(M-2)+B=4,M大於等於2 預算空間會往右多一塊平行四邊形無異曲線往右移切在(M,B)=(3,3)處 : (c)(20 points) Your TA wants to save me money. So he proposes a deal to swap : movie tickets for book coupons. Each book coupon allows your TA to buy one : book. In doing so, he tries to keep himself as well off as before in (b) but : at the same time save me the maximum possible amount of money. How many book : coupons will your TA want to swap? How many book coupons will your TA demand : in exchange for the movie tickets? (Note: Tickets and Coupons do not have to : be traded in whole numbers.) : 想法: : 如果M恆等於1，TA會想把免費的兩張電影票換成同樣價格的兩本書(？) 這題是說可將電影票換成圖書兌換券但維持和(b)小題一樣的效用由於是準線型無異曲線非線性的部分為中性財所以若讓TA自由兌換他會回歸原本M的最適選擇M=1 (b)小題效用=3+ln3=ln1+B' =>B'=3+ln3 最適解會由(3,3)移到(1,3+ln3) 故TA會拿兩張電影票換ln3張的圖書兌換券 : (d)(20 points) Your TA is smart. So he proposes a deal to swap movie tickets : for book coupons. Each book coupon allows your TA to buy one book. In : doing so, he tries to keep me sending the same amount of money as in (b) : but at the same time make himself as better off as possible. How many : book coupons will your TA want to swap? How many book coupons will your : TA demand in exchange for the movie tickets? (Note: Tickets and Coupons : do not have to be traded in whole numbers.) : 這跟上一小題都分不太清楚； : 麻煩大家了 : 謝謝<(_)> 這題看不是很清楚我猜是說TA可借入和(b)小題電影兌換券一樣的金錢並使效用達到最大新的預算線變成M+B=6 最適解為(M,B)=(1,5) 所以會拿2張電影兌換券換成2張圖書兌換券 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 218.165.24.215