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]
In the market for a good, + x*d ivk8 fzjih.:l;rassume the in:cgbqsp0 f)nu4, s5kfcome of consumers increases by 10% and quantity demanded ogkfsb0:4 un,pqc f5s)f the good increases by 5%. Calculate the income elasticity of demand (YED), and state the type of good it is.
A. YED is 0.5,Type of good is Luxury
B. YED is 0.5,Type of good is Necessity
C. YED is 2,Type of good is Normal
D. YED is 2,Type of good is Inferior
参考答案: B
本题详细解析:
YED is correctly calculate6i6 pkgl eqw;p,3ton* d as 0.5:
income elasticity of demand= $\frac{5%}{10%}$
Positive YED values that are less than 1 mean that the good is income inelastic, or a necessity good.
Choice A incorrectly identifies the product as an income elastic or luxury good (YED > 1).
Choices C and D invert the formula for YED. Additionally, a good is inferior only if its YED is negative.
| 
