Product Differentiation with Imperfect Information
构建了一个消费者对品牌规格了解不充分的垄断竞争模型，分析产品差异化程度的社会福利，发现消费者信息不完全会限制社会最优的产品多样性，市场可能提供过多品种。
The paper employs a model of monopolistic competition and product differentiation with consumers who are not well informed about the specification of the offered brands. Welfare analysis of the degree of product differentiation in such a market concludes that the socially desirable product variety is limited due to consumers' imperfect information. Consequently, when the number of consumers is sufficiently large or economies to scale in production are sufficiently weak, the market would offer excessive variety.