Agglomeration and Trade Revisited*
提出一个替代性的集聚与贸易模型，用简单代数推导分析结果，并采用前瞻性视角研究集聚过程中的移民动态，替代了文献中常用的短视的马歇尔模型。
The purpose of this paper is twofold. First, we present an alternative model of agglomeration and trade that displays the main features of the recent economic geography literature while allowing for the derivation of analytical results by means of simple algebra. Second, we show how this framework can be used to adopt a forward-looking approach to the dynamics of migration in the process of agglomeration instead of the myopic Marshallian model used so far in this literature.