问题
单项选择题
For price discrimination to work, the seller must face a market with all of the following characteristics EXCEPT:（）
A. high barriers to entry.
B. a downward sloping demand curve.
C. two or more identifiable groups of customers with different price elasticities of demand for the product.
答案
参考答案：A
解析：
Price discrimination is the practice of charging different consumers different prices for the same product or service. For price discrimination to work the seller must: 1 ) have a downward sloping demand curve, 2) have at least two identifiable groups of customers with different price elasticities of demand, 3) must be able to prevent customers in the lower-price group from reselling the product to customers in the higher-price group.