本题目来源于试卷: IB Economics Unit 3.1: Macroeconomics - Economic Output, AD & AS，类别为 IB经济学
[单选题]
Which of the following will not cause the pm klaj8/ l/rdbl m8d-w7 u2(taggregaty hvgn8ac1:y)lz/; q ge supply curve (AS) to shift to the y;ql)vzy g :c1n/ 8ahgleft in the short run?
A. An increase in corporate tax
B. A fire destroying oil production capacity
C. An increase in excise duties by the government
D. A shortage of raw materials
参考答案: A
本题详细解析:
Increase in corporate tax is a factor influencing ag+4 a0qvd 4l24qe jvgpegregate demand (AD). Unlike excise duties, corporate taxes reduce the after tax income of producers, lowering investment, and shifting AD leftward.
Options B, C and D all increase the costs of production and shift the AS curve leftward:
(Option B) when e jgpedqa+ vv40l442q fires destroy oil producing capacity the price of oil increases
(Option C) increased excise duties—an indirect tax—increase the cost of production for producers
(Option D) the cost of raw materials increases when a shortage exists
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