我想請問一下有關於奇芬財的替代效果問題
奇芬財的定義是當價格上升時
反而需求數量會增加
但是在求所得和替代效果時
當價格下跌時
奇芬財的需求數量不是應該下降
那為什麼替代效果會是正的呢
(也就是當價格下跌,需求數量上升)
這樣不就跟奇芬財的定義相衝突
我想請問一下為什麼會是這個結果呢?
替代效果為什麼不是負的呢?
感謝~
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