Abstract: This study first outlines the classic Marshallian and Weberian theories of industrial agglomeration, highlighting the difference between Weber's theory, which the process of emergence, based on predictable profit, from a state of nothingness, and Marshall's theory, which the process of continued self-reinforcement of existing Consequently, one cannot expect to understand the dynamism of industrial by viewing these two theories separately. This study integrates the two theories to identify a framework for viewing industrial dynamically. Specifically, this paper pays particular attention to gatekeeper-type companies, which capture the demand from markets outside the industrial and make use of networks within the industrial to meet that demand.Keywords: industrial agglomeration, industry, internal economies, external economies, gatekeeperIntroductionGenerally speaking, the existing theories on industrial fall into one of two branches: A. Marshall or A. Weber (Matsubara, 1999; Sumiya, 1971). The former, which could also be called small to medium enterprise theory, assumes the prior existence of industrial and examines mechanisms for the profit of agglomeration generated only after the has emerged. Fundamentally, this school asserts that external economies operate through agglomeration. The latter, which could also be called the location theory, examines why industrial emerges without assuming the prior existence of industrial agglomeration. Fundamentally, this school asserts that emerges in geographically advantageous locations. In short, the Marshall school focuses on the function of the industrial as a system, while the Weber school focuses on ex-ante rationality behind the emergence of the industrial system. Since there are major differences between the two schools in terms of their views on companies and their approach, they tend not to refer to each other. However, it is necessary to take a dynamic perspective that incorporates both emergence and function in order to consider policies on industrial agglomeration.This study discusses the possibility of integrating the Marshallian and Weberian schools, and advocates the necessity of focusing on the existence of gatekeeper-type companies, which capture the demand from markets outside the industrial and make use of networks within the industrial to meet that demand.Marshall's Localized Industry TheoryChapter 10 Industrial Organization, Continued. The Concentration of Specialized Industries in Particular Localities of Marshall's Principles of Economics discusses localized (Marshall, 1920). Directly before Chapter 10, Marshall divides the economies arising from an expansion in the scale of production into two classes: internal economies, generated by the expansion of individual businesses, and external economies, generated by the expansion of the general expansion of the whole industry. Marshall goes on to state that Chapter 10 will discuss industries because external economies are mainly seen in industries, which are the concentration of many small businesses of similar characteristics in particular localities.Marshall begins Chapter 10 by stating the causes for creating industries. For example, in one particular locality, industries have originated from family groups expanding into villages. In another locality, industries have come into existence because of natural conditions (such as soil and climate characteristics, and proximity of mines and quarries in the neighborhood, or easily accessible by land or water). Other reasons include the patronage of a court, or the systematic summonsing of artisans by rulers to build a town. …
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