| This paper takes the externality of industrial agglomeration to the environment as the breakthrough point,and constructs a simple model based on the model of Copeland-Taylor and other scholars,using industrial specialization and diversified agglomeration modes respectively.To measure industrial agglomeration,two pollution indicators of sulfur dioxide and carbon dioxide are selected at the same time,using panel data from 30 provinces in China from 2008 to 2017 to construct a linear measurement model based on the reference environmental pollution model,and then on the basis of the linear model,the population size is added as a threshold variable,and the final panel threshold model is obtained.The difference is further studied from a dynamic perspective.The results of the linear measurement model show that from the perspective of environmental protection,the development model of industrial diversified agglomeration is better than industrial specialized agglomeration.The results of the panel threshold regression model show that the impact of industrial specialization and agglomeration on sulfur dioxide pollution is promoted and further promoted;while the impact of industrial specialization and agglomeration on carbon dioxide pollution is shown to be improved and then promoted;industrial diversification and agglomeration The impact on carbon dioxide pollution is manifested in the effect of first improving and then intensifying and then improving,but the degree of improvement in the second time is not as good as the first time.In addition,energy consumption has completely different effects on pollution.Environmental regulations and industrial structure have exacerbated environmental pollution,while scientific research investment has obvious positive external effects on environmental pollution.Finally,this article provides relevant suggestions for saving,emission reduction and environmental pollution control for reference. |
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