这道题考的是哪个知识点？没太明白

问题如下：

When income elasticity equals to 0.3, which of the following statements is most likely correct?

选项：

A.

The sensitivity of the quantity demanded to a change in income is -0.3

B.

The sensitivity of the quantity demanded to a change in income is 0.3

C.

The sensitivity of the quantity demanded to a change in income is -1/0.3

解释：

B is correct.

Income elasticity refers to the sensitivity of the quantity of a good or service demanded to a change in consumer’s income.When e=0.3, this means the sensitivity of the quantity demanded to a change in income is 0.3.

考点：Income Elasticity of Demand

解析：收入价格弹性测量的是商品或服务的需求对于消费者收入变化的敏感程度。当次弹性等于0.3时，就意味着商品或服务的需求对于消费者收入变化的敏感程度是0.3