本题目来源于试卷: IB Economics Unit 2.3: Microeconomics - Elasticities，类别为 IB经济学
[单选题]
The table below indicates .tih*z: 4shp us 5oru+ the sup q3mt4k n(lqe az+s5 ,jply schedule for oranges
| Price(US$/dozen) | Quantity supplied (dozens) | | 6 | 20 | | 7 | 28 |
Calculate the price elasticity of supply (PES) when the price of a dozen oranges increases from US$\$$6 to US$\$$7?
A. 4
B. 2.4
C. 0.42
D. 8
参考答案: B
本题详细解析:
PES=$\frac{\%change\;in\;quantity\;supplied}{\%change\;in\;price}$
%change in quantity supplied =$\frac{(28-20)}{20}\times{10}$=16.67%
%change in price=$\frac{(7-6)}{6}\times{100}$=40%
PES=$\frac{40%}{16.67%}$=2.4
Choice A is incorrect as it divides the new Qs (28) by the new price (7)
Choice C is incorrect as it inverts the formula for PES
Choice D is incorrect as it divides the change in quantity supplied (8) by the change in price (1)
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