This study examines the relationship between industrial agglomeration and industrial pollution. The empirical results for the entire sample show that industrial pollution has a significant spatial spillover effect. Specifically, for every 1% point increase in industrial pollution in neighboring regions, industrial pollution in the region increases by 0.33% points. Industrial pollution shows an inverse U-shaped change with industrial agglomeration. There is a significant positive linear relationship between domestic industrial agglomeration and industrial pollution. And there is a significant inverted U-shaped relationship between domestic industrial agglomeration and industrial pollution. Furthermore, heterogeneous results are observed among different urban agglomerations, with a significant inverse U-shaped relationship between industrial agglomeration and pollution in the Guangdong-Hong Kong-Macao-Great Bay Area, the Yangtze River Delta, and the Middle Reaches of Yangtze River and a significant U-shaped relationship in Beijing-Tianjin-Hebei.
Zhang et al. (Thu,) studied this question.
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