[考試] 獨佔求社會福利極大訂價
當題目問獨佔廠商的社會福利極大定價
要寫P=AC還是P=MC比較合適?
比方下面這題的P=MC時利潤為負數理應退出市場,
但題目也沒提到短期還長期就是了,
課本解答是寫P=MC
但我覺得P=AC(利潤正數)是比較好的答案吧。
建議寫哪個呢?
謝謝
http://i.imgur.com/AvExwaI.jpg
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