Growth and Agglomeration
构建了一个模型，说明经济增长与经济活动的地理集聚是相互强化的过程：集聚通过降低创新成本促进增长，增长则通过新企业靠近创新部门而加剧集聚。
This article presents a model in which growth and geographic agglomeration of economic activities are mutually self‐reinforcing processes. Economic agglomeration in one region spurs growth because it reduces the cost of innovation in that region through a pecuniary externality due to transaction costs. Growth fosters agglomeration because, as the sector at the origin of innovation expands, new firms tend to locate close to this sector. Agglomeration implies that all innovation and most production activities take place in the core region. However, as new firms are continuously created in the core, some relocate their production to the periphery.