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Multimodal agglomeration in economic geography

Takashi Akamatsu, Tomoya Mori, Minoru Osawa () and Yuki Takayama ()

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Abstract: Multimodal agglomerations, in the form of the existence of many cities, dominate modern economic geography. We focus on the mechanism by which multimodal agglomerations realize endogenously. In a spatial model with agglomeration and dispersion forces, the spatial scale (local or global) of the dispersion force determines whether endogenous spatial distributions become multimodal. Multimodal patterns can emerge only under a global dispersion force, such as competition effects, which induce deviations to locations distant from an existing agglomeration and result in a separate agglomeration. A local dispersion force, such as the local scarcity of land, causes the flattening of existing agglomerations. The resulting spatial configuration is unimodal if such a force is the only source of dispersion. This view allows us to categorize extant models into three prototypical classes: those with only global, only local, and local and global dispersion forces. The taxonomy facilitates model choice depending on each study's objective.

Date: 2019-12, Revised 2023-04
New Economics Papers: this item is included in nep-geo and nep-ure
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Handle: RePEc:arx:papers:1912.05113