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 w7 up8.u2sjia u)f*y sqvskpd(;xo 5c;y 2k.lan,ru)qy zw 1y) ill not cause the aggregate supply curve (AS) to shift to the left in the shorcw2ks ,yrzq ;.aydp(yk5vo)u )1xn ; lt 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 influencingyrfj n s86hg:* aggregate 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 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) t sn:rfgjy 8h6*he cost of raw materials increases when a shortage exists
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