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<p>I investigate the extent to which roads and highways expand the spatial scale of urban areas in China. To overcome the potential endogeneity problem, I employ the 1962 road network as the instrumental variable and control for a set of historical agglomeration effects. The two-stage least-squares results show that the lengths of roads and highways within a city have a positive effect on the spatial scale of urban areas. The IV quantile regression confirms that for cities with a larger scale of urbanized areas, the expansion effect of roads is smaller. Using comprehensive nationwide city-level land use data and industrial and commercial firms’ registration data, I find that the main driver of the observed effect is the expansion of industrial land. The results are robust to various specifications.</p>

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Evaluating the impact of road infrastructure on urban expansion in China

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  • 发表日期：

    2025年12月29日

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  • Yixuan Wang

摘要

I investigate the extent to which roads and highways expand the spatial scale of urban areas in China. To overcome the potential endogeneity problem, I employ the 1962 road network as the instrumental variable and control for a set of historical agglomeration effects. The two-stage least-squares results show that the lengths of roads and highways within a city have a positive effect on the spatial scale of urban areas. The IV quantile regression confirms that for cities with a larger scale of urbanized areas, the expansion effect of roads is smaller. Using comprehensive nationwide city-level land use data and industrial and commercial firms’ registration data, I find that the main driver of the observed effect is the expansion of industrial land. The results are robust to various specifications.