經濟學大意 問題 - 考試

By Lydia
at 2014-10-16T15:41
at 2014-10-16T15:41
Table of Contents
請問這個問題
答案D
由供需原理知,下述何種狀況的產生一定不會造成均衡價格上升且均衡成交量減少?
(A)需求曲線右移且供給曲線左移
(B)需求曲線左移且供給曲線左移
(C)需求曲線不動且供給曲線左移
(D)需求曲線右移且供給曲線右移。
請問為甚麼B選項不能選呢?
我的想法是:需求曲線左移,導致成交量減少
供給曲線左移:供給減少,導致均衡價格上升
如果D選項供給曲線右移,那均衡成交量就不會減少了阿?
希望前輩幫忙解惑,感激不盡
--
答案D
由供需原理知,下述何種狀況的產生一定不會造成均衡價格上升且均衡成交量減少?
(A)需求曲線右移且供給曲線左移
(B)需求曲線左移且供給曲線左移
(C)需求曲線不動且供給曲線左移
(D)需求曲線右移且供給曲線右移。
請問為甚麼B選項不能選呢?
我的想法是:需求曲線左移,導致成交量減少
供給曲線左移:供給減少,導致均衡價格上升
如果D選項供給曲線右移,那均衡成交量就不會減少了阿?
希望前輩幫忙解惑,感激不盡
--
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