經濟學需求交叉彈性 - 考試
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By Jake
at 2021-03-04T20:25
at 2021-03-04T20:25
Table of Contents
https://i.imgur.com/fd4VXyr.jpg
題目的解法是:
https://i.imgur.com/VcYGVc7.jpg
在Exy的公式中,為什麼不是代入-20%呢?如果代入-20%,則dp/p應為-40%才對
要如何解釋成是票價"上升”40%而非"下降"40%呢?
經濟學弱雞在此謝謝願意回答的大大們(鞠躬)
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