问题如下:
If the income elasticity of demand for a product is –1, demand is:
选项:
A.elastic.
B.inelastic.
C.unit elastic.
解释:
C is correct.
When the price elasticity of demand coefficient is –1, demand is said to be unit elastic, or unitary elastic.
考点:unit elastic
解析:完全弹性是指商品的自由价格弹性数值为-1,所以C选项正确。
他不是小于0吗?不应该是不弹性??