NO.PZ2016010802000027
问题如下:
If the cross-price elasticity between two goods is negative, the two goods are classified as:
选项:
A.normal.
B.substitutes.
C.complements.
解释:
C is correct.
With complements, consumption goes up or down together. With a negative cross-price elasticity, as the price of one good goes up, the demand for both falls.
考点:互补品。
解析:当两类商品的交叉价格弹性为负的时候,即一种商品的价格上升会导致两种商品的需求量同时下降,那么这两种商品就是互补品。
课程里面讲,价格下降,数量上升是positive,
这道题目,如果是补充品的话,价格下降,数量上升,那应该是negetive啊