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经济空间集聚是导致碳生产率变动的重要途径,本文采用地级以上城市的统计数据,构建动态GMM模型和面板门限模型,分别从企业、产业和区域三个层面实证检验了经济空间集聚对碳生产率的影响。结果表明:以市场动力为基础的微观企业向市场中心靠近能够提高碳生产率水平。多样化的集聚模式更有利于提高碳生产率,专业化的集聚模式对碳生产率影响不显著。政府对产业集聚干预带来的资源错配不利于碳生产率的提高,其中,政府通过金融干预导致的专业化集聚比多样化集聚带来的碳生产率损失更大。表征区域层面集聚的城市就业密度对碳生产率产生了先促进后抑制的作用,两者呈现倒“U”型关系。本文的研究结论对于中国优化经济要素空间形态以保持经济增长和稳定大气中二氧化碳总量目标具有重要的理论和现实意义。
Aggregation of economic space is an important way to lead to changes in carbon productivity. This paper uses the statistics of cities above prefecture level to build a dynamic GMM model and a panel threshold model, and empirically tests the effect of economic spatial agglomeration on carbon productivity from three aspects: business, industry and region Impact. The results show that: the market power-based micro-enterprises closer to the market center can raise the level of carbon productivity. Diversified agglomeration patterns are more conducive to increasing carbon productivity, and the specialized agglomeration patterns have no significant impact on carbon productivity. Misallocation of resources by government intervention in industrial agglomeration is not conducive to the improvement of carbon productivity, of which, the government¡¯s specialized agglomeration caused by financial intervention will lose more than the carbon productivity brought by diversified agglomeration. Urban agglomeration density, which characterizes regional agglomeration, has the effect of first promoting and then restraining the carbon productivity, and the two show a reversed U-shaped relationship. The conclusion of this paper has important theoretical and practical significance for China to optimize the spatial form of economic elements in order to maintain the economic growth and stabilize the total amount of carbon dioxide in the atmosphere.