著者

李 友炯 細江 守紀

出版者

日本地域学会

雑誌

地域学研究 (ISSN:02876256)

巻号頁・発行日

vol.30, no.3, pp.1-12, 1999

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Urban or metropolitan area which results from the concentration of population is due to the existence of economies of scale or agglomeration. At the same time, however, with urban concentration, urban area expands to the outside of the city. Such expansion of urban area generates inner city decay and suburban sprawl. Faced with such problems, many countries have adopted urban growth control policies.<br>Greenbelt is one of the growth control measures. It was established by England first, many countries (e. g. Korea and some regions of Australia, Canada and New Zealand) adopt the policy now. The main purpose of greenbelt is not only to control the urban expansion but also to preserve the natural environment.<br>In this paper, we introduced the congestion externality in the closed city model and examined the optimal size of greenbelt when it is a pure public good. In addition, we investigated the social effect of greenbelt. The results are as follows. The condition of optimal size of greenbelt satisfies Samuelson condition. The size that maximizes the total profit of landowners is socially optimal. Finally, the stronger the preference for greenbelt, the larger the size of greenbelt; the stronger the preference of private good or lot size, the smaller the size of greenbelt; the higher the household income, the larger the size of greenbelt; the higher the transport cost, the smaller the size of greenbelt.