Quality and Imperfect Competition
研究了市场力量与质量供给的关系，提出一个灵活的分析框架，涵盖多种不完全竞争模型，并给出可实证估计的充分统计量，用于分析质量扭曲、技术冲击、商品税和市场集中度变化的影响。
We study the relationship between market power and quality supply. We develop a flexible approach to imperfect competition in product qualities and prices (or quantities), which encompasses several existing models. We uncover sufficient statistics, including our quality parameter, which can be estimated empirically, for many comparative statics. These statistics allow us to extend the seminal analysis of quality distortion under monopoly to imperfect competition, and to analyze the effects of technology shocks and commodity taxes, as well as changes in market concentration. Our approach accommodates various modelling choices related to firms' costs, the timing of the game, or multi-product firms.