When Is Price Discrimination Profitable?
构建垄断价格歧视的一般模型，刻画其有利可图的条件：产品升级带来的剩余百分比变化随消费者支付意愿递增，即“递增百分比差异”条件，并联系营销、经济学和运营管理文献中的已知结论。
We consider a general model of monopoly price discrimination and characterize the conditions under which price discrimination is and is not profitable. We show that an important condition for profitable price discrimination is that the percentage change in surplus (i.e., consumers' total willingness to pay, less the firm's costs) associated with a product upgrade is increasing in consumers' willingness to pay. We refer to this as an increasing percentage differences condition and relate it to many known results in the marketing, economics, and operations management literatures.