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尽管对美国城市系统的研究已经很多,但关于批发贸易职能方面几乎未做过什么工作.从地理学观点确定出批发贸易这一概念的主要著作仅有万斯(Vance)著的《商家世界》.关于批发贸易的论述不是没有就是极为简单.本文集中研究40个批发贸易中心,对美国各大城市的批发贸易功能进行了检查.研究目的:(1)检验城市批发贸易优势随时间变化的程度;(2)用数值表示出个别SMSA①的排列次序转移的型式;(3)离析出促使这些城市的批发贸易作用变化的原动力;(4)提议建立一个可能被接受的美国城市系统批发贸易发生变化的模型.前两个目的可以通过检验排列次
Although there has been much research on the urban system in the United States, little work has been done on the functions of the wholesale trade, and the only major works that have identified the concept of wholesale trade from a geographical point of view are only Vance’s Business World The discussion on the wholesale trade is not without its simpleness.This paper focuses on 40 wholesale trade centers and examines the wholesale trade functions of major cities in the United States.Objectives: (1) To test the extent of the urban wholesale trade over time ; (2) Numeric representation of the pattern of the order-shifting of individual SMSA (1); (3) Segregation of the driving forces behind changes in the role of wholesale trade in these cities; (4) Proposed establishment of a possible acceptance of changes in the wholesale trade of urban systems in the United States The first two purposes can be ranked by inspection