[考題] 兩題經濟問題請教:－2016徵求年菜推薦網路訂購最紅的商家.年菜訂購?台北年菜外送餐廳推薦(年菜)?年菜.今年不想做年菜推薦,網路宅配哪一家好?

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[考題] 兩題經濟問題請教

Oct 4th 2013, 21:03, by yeu3021

作者yeu3021 (嗯哈哈)

站內Examination

標題[考題] 兩題經濟問題請教

時間Fri Oct 4 21:03:51 2013

101高考經濟某產品為完全競爭市場，所有廠商有相同的成本函數：c=q平方+4，q為廠商產量。若市場需求函數為：Q=120-P，Q為市場數量，P為市場價格，則長期均衡時市場的廠商數量為 (A)28 (B)58 (C)60　（Ｄ）８２答案是（Ｂ）長期均衡是Ｐ＝ＬＡＣ，且ＬＡＣ最低點，但我怎麼算都算不出來，到底是哪裡出錯？麻煩大家解答！１００鐵特假設Ａ、Ｂ兩人皆存活兩期，此兩人的兩期所得皆為Ｙ1與Ｙ2。兩人的效用函數分別為Ｕａ＝Ｕ（Ｃ１）＋〔Ｕ（Ｃ２）／（１＋Ｐａ）〕及Ｕｂ＝Ｕ（Ｃ１）＋〔Ｕ（Ｃ２）／（１＋Ｐｂ）〕，其中Ｃ１、Ｃ２為兩期消費，Ｐａ＞Ｐｂ，Ｕ’＞０，Ｕ”＜０。已知，當Ｃ１＝Ｙ１、Ｃ２＝Ｙ２時，Ａ的效用恰好達到最大。若Ａ、Ｂ兩人面對相同的借貸利率，則根據上述，下列何者錯誤？（Ａ）Ｃ１＝Ｙ１、Ｃ２＝Ｙ２不是Ｂ的效用極大點（Ｂ）Ｂ在效用極大時，其第一期儲蓄為負（Ｃ）如果效用可以比較，Ｂ的極大效用會大於A的極大效用（Ｄ）當Ａ、Ｂ兩人皆達到效用極大時，Ｂ的第二期消費會大於Ａ的第二期消費答案是（Ｂ）　　這題我除了（Ｃ）以外，其餘都看不懂，煩請高手傾囊相授！！謝謝 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 180.218.242.122

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