[請益] 有關外部性計算的DWL (已補原題目)
補上原題目 中山大學碩士班98企管經濟學考題
suppose that your local internal provider,USA-line,
is congested around 8 pm on Thursday nights,which is
when many students downlaod Friday's homework assignment
from their professors' home pages.
Thursday nights represent the peak volume time for USA-line.
USA-line's supply curve can be represented as P=2+2Q.
The cost of the congestion during peak times can be represented as P=Q.
The marginal benefit during peak times can be represented as P=18-Q.
If USA-line is unware of the externality effects of the congest during
peak on-line tines,what is the value of the deadweight loss??
(A) 2.66
(B) 5.32
(C) 8
(D) 14.21
抱歉 不會BBS畫圖
概敘一下題目
需求函數: P=18-Q
私人成本: MPC=2+2Q
外部性成本: MDC=Q
社會總成本 MSC=MPC+MDC=2+2Q+Q=2+3Q
我有求出
私人均衡解: Q=16/3, P=38/3
社會福利最大的解: Q=4 ,P=14
問題來了
我不是很確定這邊DWL的面積是哪一塊
而且這邊福利的觀念有點搞混
希望有人可以點出我的盲點
感恩
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◆ From: 220.142.5.219
※ 編輯: tryitredboy 來自: 220.142.5.219 (02/03 15:48)
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補上選擇題選項 當然也有可能沒有答案
arnys大 可以再多說明一下作法嗎??
※ 編輯: tryitredboy 來自: 220.142.5.219 (02/04 00:04)
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補習班的詳解 DWL是取三角形 (4,14) (16/3,38/3) (16/3,18)
不太懂為什麼他DWL取這段面積 所以才來問
※ 編輯: tryitredboy 來自: 220.142.5.219 (02/04 10:02)
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