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[考題] 103鐵路高員級 經濟學 (Cournot競爭)
Jun 19th 2014, 18:17, by kirok

作者kirok (寂靜)

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標題[考題] 103鐵路高員級 經濟學 (Cournot競爭)

時間Thu Jun 19 18:17:19 2014

Q21 假設雙占市場上只有甲廠商與乙廠商，且兩家廠商生產的邊際成本皆固定為20， 若兩家廠商進行古爾諾競爭(Cournot Competition)，當市場需求為 P=50-Q 時， 則市場均衡價格為： (A)P=10 (B)P=20 (C)P=30 (D)P=40 答案：(C) 想法： MCa=20，TCa=40q^0.5 πa= TRa-TCa = (50-qa-qb)*qa-40q^0.5 = 50qa-qa^2-qaqb-40q^0.5 dπa/dqa=0，50-22qa=qb 50-22qb=qa 聯立求解後 答案不對 請教哪裡算錯了呢，謝謝~~ -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 114.41.246.9 ※ 文章網址: http://www.ptt.cc/bbs/Examination/M.1403173043.A.688.html

推 folksuite:TCa錯了…應該是20qa+C 06/19 18:25

推 dog07221992:TCa=20q？ 06/19 18:27

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