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]
Assume the price elasticity of demand (PED) cm/-g rx9cb - 4sc5j-gy uwag8for a home cleaning 4)ql0b(y q,vl z.e/a yhx9rjyservice changes from 1.81.8 to 1.21.2. Which of the following statements explain this chy ehallqzx)v9r y .0y(bj/q ,4ange?
I. a competing firm increased its operating hours
II. a competing firm begins focusing on office cleaning
III. incomes of potential customers increase
A. I only
B. I and II only
C. I and III only
D. II and III only
参考答案: D
本题详细解析:
Statement I is incorqaz* y5rix*0z rect: if a competing firm increases its hours, that firm is more competitive with the original firm—PED for the original firm increases.
Statement II is correct: if a competing firm begins to focus on other customers (offices), that firm is less competitive with the original firm—PED for the original firm decreases.
Statement III is correct: if the incomes of potential customez5ai yx*0* rzqrs increase, the price of home cleaning will be a smaller proportion of income—PED for the service decreases.
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