INCOMES, TRADE, AND THE BALANCE OF PAYMENTS WITHIN AN URBAN SYSTEM*
研究了层级城市体系中贸易和非贸易流动（政府转移、资本流动）的结构，提出了一个关注各层级收入的均衡模型，并探讨了贸易失衡如何在均衡中持续。
ABSTRACT Attention is initially focused on the principal characteristics of a hierarchical urban system. The structure of trade flows among the various levels of the hierarchy is outlined, and consideration is then given to nontrade flows, these comprising government transfers and capital movements, as well as the associated property‐payment flows. An equilibrium model is presented which is concerned with income at each level of the hierarchy. The balance‐of‐payments implications of the model are explored, and there is a discussion of the manner in which a trade imbalance at a particular level can be sustained in equilibrium.