Product-market integration with endogenous firm heterogeneity
构建了一个一般均衡寡头模型，其中企业异质性通过技术采纳决策内生产生，解释了自由进入和市场扩大下寡头市场结构与价格持续存在的原因，并分析了市场一体化的福利效应。
Abstract This paper proposes a general equilibrium oligopoly model in which firm heterogeneity is endogenously reproduced through technology adoption decisions. The model can explain persistent oligopolistic market structures and prices in spite of free entry and market enlargement. Moreover, strong selection might deteriorate average cost efficiency due to strategic interactions. Integrating identical countries can be welfare-improving. But distributional issues and tensions between welfare and scale economies may arise. The theory can be motivated by recent evidence on oligopolistic market structures resisting globalization forces.