单选题
Which one of the following statements correctly defines the income elasticity of demand?
A、
The percentage change in quantity demanded divided by the percentage change in income.
B、
The percentage change in income divided by the percentage change in quantity demanded.
C、
The percentage change in quantity supplied divided by the percentage change in income.
D、
The percentage change in income divided by the percentage change in quantity supplied.
【正确答案】
A
【答案解析】
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