Urban Economics Workshop
Kyoto University

  場所:京都大学経済研究所 本館1階 第二共同研究室 【交通アクセス】【本部構内MAP】


世話人: 文世一 (京都大学大学院経済学研究科) [HP]
森知也 (京都大学経済研究所) [HP]
松島格也 (京都大学大学院工学研究科) [HP]
山本和博 (大阪大学大学院経済学研究科)
松尾美和 (神戸大学経済経営研究所) [HP]

         TEL: 075−753−7120(秘書・中村) FAX:075−753−7198

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(Last Updated on 05/26/17 by Yuki Nakamura)



論題:The effect of automation on intercity migration(仮題)


論題:Spatial scale of agglomeration and dispersion: Theoretical foundations and empirical implications(with T. Akamatsu, T. Mori and Y. Takayama)

要旨:In this paper, we revisit a wide variety of existing economic geography models in a many-region setup, and investigate the spatial scale of agglomeration and dispersion intrinsic to each model. By characterizing spontaneous agglomerations specific to each model in a unified analytical framework, we show that these models reduce to two canonical classes: one with global dispersion force and the other with local dispersion force. Their formal distinction is that the global dispersion force is dependent, while the local one is independent of the distance structure of the model. These classes exhibit two stark differences. First, regarding the response to transport costs, local dispersion is triggered by lower transport costs, while global one by higher transport costs. Second, regarding the agglomeration pattern, multiple agglomerations emerge but are spread over the regions in the former, while the agglomeration always takes the form of a unimodal regional distribution of mobile agents in the latter. These variations in agglomeration behavior accruing from the variations in spatial scale are not well recognized in the existing empirical literature of regional agglomeration. In particular, a decrease in interregional transport cost in a given region does not necessarily promote agglomeration in that region, as the majority of reduced-form regression approaches assume (e.g. Redding and Turner, 2015). Moreover, the well-accepted structural approachers adopt the models of the latter class (e.g., Redding and Sturm, 2008; Allen and Arkolakis, 2014) which are incapable of explaining the endogenous formation of multiple agglomerations.



論題:An Economic Analysis of Mega Terminal Operators(with S. Mun)

要旨:In recent decades, some large terminal operators has strengthen their presence in seaports and they are called "mega terminal operators." One remarkable feature of the mega operator is its operations at multiple ports in foreign countries. This has completely changed competition structures in seaports all over the world. In this paper, we present a formal economic model of maritime transportation which incorporates foreign operation by mega terminal operators. We investigate how the emergence of a mega terminal operator affects the port charges and the welfare of two countries by comparing two cases, i.e., with and without a mega terminal operator. We also examine whether the international operation by the mega operator could be an equilibrium outcome, by looking at the incentives of the operators and the government. It is shown that the emergence of the mega operator is world welfare improving, but the effect on the foreign country is ambiguous: the welfare of the foreign country tends to be greater when the relative demand size of the foreign country is larger and the substitutability of two services are sufficiently low. Furthermore, in the entry game, there exist equilibria where one operator chooses to be the mega terminal operator and the other chooses not, when the substitutability of two services are sufficiently high and the costs for entry are intermediate.