全国统一大市场建设会抑制行政边界污染排放吗

Does the Construction of the Unified National Market Suppress Administrative Boundary Pollution Emissions?

本文基于中国工业企业数据库、中国工业企业污染排放数据库及城市层面的相关合并数据,在科学识别城市边界重污染地带的基础上,考察了市场一体化对城市边界重污染地带企业污染排放的影响。研究发现,商品市场一体化和要素市场一体化水平的提升均能显著降低城市边界重污染地区企业的排污强度,在使用多种方法进行稳健性检验并有效处理内生性问题之后,该结论仍然成立。机制考察结果表明,商品市场一体化主要通过加强市场竞争和优化产业结构降低边界地区企业的排污强度,而要素市场一体化则侧重通过降低企业边际成本、提高要素配置效率和绿色创新水平促进边界地区企业减排。进一步的异质性分析还发现,相较于清洁行业、省边界以及内陆城市,市场一体化更有利于促进污染行业、非省边界及沿海城市边界的企业减排;相较于国有企业、非技术密集型企业,市场一体化对非国有、技术密集型边界企业的减排效果更大。本文研究结论为全国统一大市场建设助推绿色高质量发展、有效解决城市边界污染问题提供重要的经验证据。

Accelerating the establishment of a unified national market is an inherent requirement for China to promote green and high-quality economic development in the new era.How to accelerate the efforts of enterprises to reduce pollution,especially how to rectify the pollution reduction of enterprises in city-border areas,is a major problem that China urgently needs to solve for economic development.To this end,based on the China Industrial Enterprise Database,China Industrial Enterprise Pollution Emissions Database,and relevant merged data at the city level,after the scientific identification of heavily polluted areas at city borders with spatial breakpoint regression,this paper examines the impact of market integration on the emissions of enterprises in heavily polluted areas on city borders.The study finds that the improvement in commodity market integration and factor market integration can significantly reduce the pollution intensity of enterprises in heavily polluted areas on city borders.After using a variety of methods to conduct robustness tests and effectively deal with endogenous problems,this conclusion is still valid.The results of mechanism analysis show that commodity market integration mainly reduces the emissions intensity of enterprises in border areas by strengthening market competition and optimizing the industrial structure,while factor market integration focuses on reducing enterprises'marginal cost and improving the efficiency of factor allocation and level of green innovation to promote the emissions reduction of enterprises in border areas.Heterogeneity analysis also finds that compared to companies in the clean industry,provincial borders,and inland cities,market integration is more conducive to promoting emissions reduction in enterprises in polluting industries,non-provincial border areas,and coastal city border areas;compared to state-owned enterprises and non-technology-intensive enterprises,market integration has a greater emissions reduction effect on non-state-owned and technology-intensive enterprises.The research conclusion of this paper provides important empirical evidence for promoting green and high-quality development in building a unified national market and effectively solving the pollution problem of city borders.The marginal contributions of this paper are as follows.Firstly,it uses the breakpoint regression method to identify heavily polluted areas on city borders.Secondly,it puts markets of integrated factors and commodities into the same framework to explore the governance of border pollution from the perspective of a unified large market.Thirdly,it examines the emissions reduction mechanism of market integration from the perspectives of marginal cost,resource allocation,green innovation,corporate pollution treatment technology and industrial structure.