FIRM HETEROGENEITY, MULTIPLANT CHOICE, AND AGGLOMERATION
研究异质性企业在两区域经济中的组织与选址决策，发现运输成本下降会强化高生产率多工厂企业关闭小区域工厂、低生产率单工厂企业迁入小区域的空间分选，扩大区域生产率差距；而降低投资成本则弱化这一效应。
ABSTRACT We examine the organization and location choice of heterogeneous firms in a two‐region economy. When some high‐productivity firms engage in multiplant production, a reduction in transport costs causes two changes in a small region: the closure of plants by high‐productivity multiplant firms and the relocation of low‐productivity single‐plant firms to the region. In the presence of high‐productivity multiplant firms, therefore, a decline in transport costs reinforces the spatial sorting of firms by productivity, enlarging the productivity gap between large and small regions. Conversely, reducing investment costs weakens the spatial sorting effects on regional productivity disparities.