財政學 外部性 102普考 想不通 - 普考
By Rae
at 2015-09-17T10:28
at 2015-09-17T10:28
Table of Contents
若無政府介入,則可免費使用共有資源(common property resources)之廠商的長期均
衡:
(A)利潤必大於零,產量必過多
(B)利潤必大於零,產量必太少
(C)利潤必等於零,產量必過多
(D)利潤必等於零,產量必太少。
答案c
主要疑問是利潤為什麼必等於零?
是因為長期下來大家會耗盡資源,而造成無利潤嗎?
但依照外部性圖形如下,不管制的話,廠商不是會有EFH面積的利潤嗎?
http://i.imgur.com/QcXKydS.jpg
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