日照间距约束、人口密度与中国城市增长

Sunlight Space Constraint,Population Density and Urban Growth in China

本文引入建筑日照间距约束视角,基于中国632个县级及以上城市数据探讨了20世纪80年代以来建筑日照间距政策引起的人口密度外生变化,并在此基础上估计了建成区人口密度对城市增长的影响。研究发现较高的地理纬度和旨在保证有效日照时间的城市规划政策显著降低了北方城市的人口密度,进而抑制了城市经济增长和人口规模的扩张。这一结果在使用了夜光数据反映城市增长后仍然是高度稳健的。本研究评估了地理因素和规划政策对城市发展的影响,为理解我国城市空间结构与经济增长的南北差异提供了新的视角。

Based on the data for 632 cities,we introduce the way to estimate the effect of population density of built district on urban growth from the perspective of sunlight space,using one souse of exogenous variation in population density caused by relevant policies for sunlight space between buildings since the 1980 s.We find that the higher geographical latitude and the urban planning policy aimed at ensuring sunlight space between buildings significantly reduce the population density in northern cities,and thus have a negative impact on urban population growth and economic growth.The results are robust after using night lights data to measure urban growth.Our study assesses the impact of geographical factors and planning policies on urban development,and provides a new perspective to understand the north-south difference of urban spatial structure and economic growth in China.