Spatiotemporal Characteristics and Spatial Spillover Effects of Urban Shrinkage in China:Based on the Perspective of Borrowed Size
In recent years,the phenomenon of urban shrinkage has become increasingly prominent in China.It is of great significance to objectively and accurately identify the phenomenon of urban shrinkage and explore its influencing factors for the construction of new urbanization.This study meticulously examines this phenomenon by focusing on 286 prefecture-level cities of China from 2011 to 2018.It constructs comprehensive evaluation system of urban shrinkage,empirically tests the impact factors of urban shrinkage using the methods of the two-way fixed effects model,spatial Durbin model,and panel threshold model from the perspective of borrowed size.It's found that:1)Chinese cities which exhibit a unique duality shrink and grow simultaneously within the same geographical confines.Moreover,shrinking cities are not a homogeneous group,it exhibits significant disparities in terms of their numbers,shrinkage degree,and regional distribution.2)The borrowed function effect and the borrowed performance effect both show heterogeneity in urban agglomerations and non-urban agglomerations,and there is a phenomenon of"spatial spillover effect".The functional level exists in the form of scale borrowing,and the effect is significant throughout the country.The performance level exists in the form of agglomeration shadow,and the effect is not significant in non-urban agglomerations.3)Borrowed size has a non-linear effect on urban shrinkage due to different city sizes.The order of functional scale borrowing level from high to low is big-sized cities,small-sized cities,medium-sized cities.Small and medium-sized cities show agglomeration shadow,while big-sized cities show performance scale borrowing at the performance level.