On the Optimality of Central Places
基于Eaton和Lipsey模型，证明在最小化总运输和生产成本的配置中，低购买频率的商家会与高购买频率的商家聚集，形成社会最优的中心地等级体系。
Using the Eaton and Lipsey mode, one shows that a hierarchical system of central places is socially optimal: firms having less frequent purchases are clustered with firms having more frequent purchases in any configuration minimizing total transport and production costs