其结果有二：第一，分别研究了垄断厂商二段、三段定价执行二级价格歧视的情形，并给出了需求区间的最优分段点；
The results are as the following: 1. the best division points of demand interval in the case of two stage pricing and three stage pricing are respectively given.
其结果有二：第一，分别研究了垄断厂商二段、三段定价执行二级价格歧视的情形，并给出了需求区间的最优分段点；
The results are as the following: 1. the best division points of demand interval in the case of two stage pricing and three stage pricing are respectively given.
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