问题
单项选择题
Kristen Chandler, CFA, has been doing research about different types of goods. Which of the following goods has a positively sloped demand curve as a result of the negative income effect overweighting the positive substitution effect()
A. Veblen.
B. Giffen.
C. Inferior.
答案
参考答案:B
解析:
吉芬商品(Giffen goods)是劣等品(inferior goods)的一种。对于吉芬商品而言,当价格下降时,负的收入效应要超过正的替代效应,最后的总结果会使得价格下降时需求减少,所以吉芬商品有正斜率的需求线。对于其他劣等品而言,负的收入效应不会超过正的替代效应,最后的总结果会使得价格下降时需求增加。对于凡勃伦商品(Veblen goods)而言,当价格更高时需求增加,但这并不符合题目中收入效应和替代效应的关系。