Imperfect price discrimination, market structure, and efficiency
通过将企业掌握的消费者位置信息建模为划分，研究了信息质量对市场均衡的影响，发现不完全价格歧视能带来最有效的自由进入结果。
Abstract. We introduce a flexible third‐degree price discrimination framework by modeling the information firms possess about consumers’ locations (preferences) on the Salop circle as a partition. Higher information quality is translated into a partition refinement. In the limit, we obtain the perfect price discrimination paradigm. We show that the free‐entry equilibrium number of firms exhibits a U‐shape as a function of the quality of information. This implies that imperfect price discrimination generates the most efficient free‐entry outcome.