“差价返还”等销售方式通常并不违法,但对于具有市场支配地位的经营者,如果借助差价返还实施价格歧视的,则可能构成反垄断法所禁止的歧视行为;经营者之间借助差价返还,促成价格同盟固定价格的,则可能构成反垄断法所禁止的垄断协议(卡特尔)行为。本文就此问题展开了比较深入地研究。 “Difference in return ” and other sales methods are usually not illegal, but for the dominant market operators, if the price differential with the return of the implementation of price discrimination, may constitute anti-monopoly laws prohibit discrimination; between operators with the help of Difference in the price returned, to promote the price of a fixed price union, it may constitute a monopoly agreement (cartel) prohibited by antitrust laws. This article has conducted a more in-depth study on this issue.