補貼之後的市場需求函數的變化 - 經濟

By Leila
at 2017-06-04T13:32
at 2017-06-04T13:32
Table of Contents
有一個市場的需求函數是Q=120-2p,
換算後,P=60-0.5Q,
當政府對每單位銷售補貼8元時,
此時函數不是應該變成「P=60-0.5Q-8Q」嗎?
8Q是因為每單位都補貼8元,所以價格降低,而看賣了幾單位的Q,就扣掉多少錢--從量補
貼。
但是正確答案卻是「P=68-0.5Q」,
如果是直接加8元,價格提高,那不就變成扣定額稅了嗎?
求高手指點....
--
換算後,P=60-0.5Q,
當政府對每單位銷售補貼8元時,
此時函數不是應該變成「P=60-0.5Q-8Q」嗎?
8Q是因為每單位都補貼8元,所以價格降低,而看賣了幾單位的Q,就扣掉多少錢--從量補
貼。
但是正確答案卻是「P=68-0.5Q」,
如果是直接加8元,價格提高,那不就變成扣定額稅了嗎?
求高手指點....
--
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