Market Size, Division of Labor, and Firm Productivity
扩展了Krugman的新贸易模型，引入明确的生产链，其中一系列任务由多个专业化团队顺序执行。研究发现市场规模扩大促使团队间分工深化，进而提升企业生产率，是对斯密定理的形式化，并解释了市场规模差异如何限制国际技术转移。
We generalize Krugman's (1979) "new trade"model by allowing for an explicit \nproduction chain in which a range of tasks is performed sequentially by a number of \nspecialized teams. We demonstrate that an increase in market size induces a deeper \ndivision of labor among these teams which leads to an increase in fim productivity. \nThe paper can be thought of as a formalization of Smith's (1776) famous theorem \nthat the division of labor is limited by the extent of the market. It also sheds \nlight on how market size differences can limit the scope for international technology \ntransfers.