[請益] 一些個經題目

看板Economics作者dododino (喔耶～)時間17年前 (2009/02/24 16:19)推噓5(5推 0噓 12→)

留言17則, 6人參與討論串1/3 (看更多)

1.下列何者為真? (A)消費者想要得到最大的效用，就Ｘ及Ｙ兩種商品而言，他必須選擇相同消費量 (B)如上所述，其最大效用的組合，在於Ｘ及Ｙ的邊際效用相同 (C)如上所述，其最大效用的組合，在於Ｘ及Ｙ每一元的消費所產生的邊際效用達到最大 (D)如上所述，其最大效用的組合，在於Ｘ及Ｙ商品每一元的消費所產生的　邊際效用與貨幣的邊際效用相同答案是C 但我覺得D也沒有什麼不妥 2.捷運木柵線通車後，有一個團體做了研究發現乘客對捷運的需求彈性是0.15 而捷運對公車的交叉彈性是0.6，假如捷運票價預定調漲１／３，為了維持　捷運的乘坐量不變，公車票價的漲跌幅度為？答案是8.3% 解答是這樣寫的: |Ed|=0.15=-(dQ/Q)/(1/3) => (dQ/Q)=-0.05 Exy=(dQ/Q)/(dPy/Py)=0.6 => (dPy/Py)=0.05/0.6=1/12=0.083 我的問題是當捷運乘坐量下跌5%後要再回到本來的乘坐量變化率應該不是5% 例如:本來100人下降5% 則剩95人 , 但95人回到100人的變化量應該是5/95 而不是5/100 雖然數字沒有差太多不會我覺得這樣概念比較對是我太吹毛求疵了嗎?? 3.The phenomenan of the backward-bending market supply curve for labor (A)reflects the policy of labor unions (B)shows the tradeoff between pleasure and pain (C)indictes workers' desires to buy more leisure as income rise 答案是A 可是跟工會有什麼關係呢? 不是IE>SE所以應該選C嗎? 4. 若某甲有稟賦財富Wo，若某甲參加一場遊戲有p1可以額外獲得w1獎金，有p2的機率可以獲得W2的獎金，則此遊戲為公平遊戲的條件為？答案是E(M)=P1W1+P2W2=0 可是P1 W1 P2 W2 皆>0 這個等式怎麼可能成立呢? 所以解答應該要再扣掉玩遊戲的成本C才對嗎? 可是題目沒給的時候該怎麼寫呢? 還是經濟學裡就是這樣定義的呢? 5.廠商以媒體廣告促銷產品必然會導致其: (A)平均總成本線上移 (B)邊際成本線上移 (C)產品需求的價格彈性變大 (D)短期利潤增加 (E)以上皆是答案是AB 但是我覺得雖然利潤Π=Π(q,a) 但是q會影響廣告量嗎? 有些題目都是把a和q當作兩個獨立變數討論的這裡解答則寫令廣告成本函數為v(x) 也就是產量的函數總覺得怪怪的廣告應該是像課定額稅一樣只是令AC上移而已吧? 我覺得答案是A 6. Which one of the following does NOT correctly state a constrast between price competition and monopolistic competition? (A)In price competition capital equipmenttends to be fully utilized whereas in monopolistic competitionit is not. (B)Price competition usually results in wide price swings, whereas in monopolistic competition there is usually less price sensitivity. (C)Price competition has cyclical price flexibility, whereas monopolistic competition has less cyclical price flexibility (D)In price competition, it usually pays the vendor to divert effort to selling and advertising, whereas in monopolistic competition it does not. (E)In price competition products are homogeneous in quality, whereas in monopolisticcompetition they are not. 答案是C 我認為價格競爭是寡佔市場的特徵而寡佔市場比壟斷性競爭市場價格較不波動所以C應該沒有錯啊? 倒是D 好像這兩種市場都會廣告增加產品的異質性? 所以我的答案是D 7. 下列命題何者為真? (A)穀價上漲則地租必上漲 (B)地租上漲則穀價必上漲 (C)穀價與地租無關 (D)地租與穀價互為因果關係 (E)以上皆非答案是A 是用李嘉圖的總體概念來解釋但是題目又沒有說要用哪一派來解釋所以一般來說就是用這個想法來答嗎? 不然我會選D 8.calculate the opportunity cost of holding money for the past year when the money you held earned 6.5% at the bank and the return for securities paid 9% and inflation was 2%. 答案是7% 這是怎麼算出來的@@"? 9.In order to find the marginal revenue product if a factor of production,it is necessary to multiply: (A)the marginal productivity of the factor times the market price of the factor (B)marginal revenue of the output times the number of units of the factor employed. (C)MPL times the price of the output that the factor produces (D)MC of the output times the numberof the factor that are employed 答案是B 為什麼是MRP乘上勞動量(假設要素是勞動的話) 我會選A 在完全競爭市場時 MRP=MR*MPL=P*MPL 10. Suppose that all workers place a value on their leisure of 75 goods per day. The rpoduction function relating output per day(Y) to the number of people working per day (N) is Y=500N-0.4N^2, theMPN=500-0.8N A 25% tax is levied on wages. (1)How much is output per day? (2)In terms of lost output, what is the cost of the distortion introduces by this tax? 答案是 (1) N=507.8 Y=150756.6 (2)-1977.8 完全沒有頭緒@@" 11.下列這句話哪裡錯了? 在完全競爭的產品市場與因素市場中，一般均衡的結果，一定同時滿足PARETO最適效率與公平之要求 PS. 還有一般來說若題目沒有指明是否為完全競爭市場都用完全競爭來看嗎? 感覺有時候要這樣想有時候又想要非完全競爭是否會導致選項敘述不完全之類的謝謝解答^^ -- 謝謝M大指正^^ ◆ From: 118.160.69.132

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