WHICH FIRMS ARE LEFT IN THE PERIPHERY? SPATIAL SORTING OF HETEROGENEOUS FIRMS WITH SCALE ECONOMIES IN TRANSPORTATION
在贸易与地理模型中引入运输规模经济，发现中等生产率企业迁往核心区，而高、低生产率企业留在外围，贸易自由化导致企业逐步向核心区迁移但最高生产率企业仍留在外围。
ABSTRACT This paper introduces scale economies in transportation in a trade and geography model with heterogeneous firms. This relatively small change to the standard model produces a new pattern of spatial sorting among firms. In contrast to the existing literature, our model produces the result that firms of intermediate productivity relocate to the large core region, whereas high‐ and low‐productivity firms remain in the periphery. Trade liberalization leads to a gradual relocation to the core with the most productive firms remaining in the periphery.