公共服务供给与城市雾霾治理

探讨政府公共服务供给与雾霾治理的影响及作用机制，有助于为优化政府公共服务职能及加强生态文明建设提供新思路。通过构建一个包含公共服务供给和环境污染的内生增长模型，在内生增长的框架下分析公共服务供给影响环境污染的传导路径。在理论研究的基础上，利用2005—2016年中国281个地级市的相关数据，实证分析公共服务供给对雾霾污染的影响，并检验影响差异及传导机制。研究结果显示:（1）公共服务供给能够显著降低城市雾霾污染，可以将其作为有效降低空气污染的手段之一；（2）中等以上城市公共服务供给水平的提高对雾霾污染具有明显的抑制作用，随着城市规模扩大，公共服务供给的雾霾治理效应不断增强；（3）基础类公共服务与民生类公共服务均对雾霾污染产生一定负向影响，前者对雾霾污染的改进作用大于后者；（4）公共服务供给的雾霾治理效果存在一定的地区与时期差异性；（5）公共服务供给通过技术进步效应、产业结构效应和收入规模效应影响城市雾霾污染。其中，公共服务供给一方面能够通过提升技术进步和收入水平对雾霾污染起到抑制作用，另一方面通过增加工业比重加剧雾霾污染。研究拓展了公共服务供给和环境治理的相关理论，为优化公共服务供给决策以及城市绿色发展提供了新的视角。

The Impact of Public Service Supply on Haze Pollution——Heterogeneity and Mechanism

Exploring the influence and mechanism of government public service supply and haze control will help provide new insights for optimizing government's public service function and enhancing the construction of ecological civilization. This essay explores the channel through which public service supply affects environmental pollution via technological process, industrial structure and income level by constructing an endogenous growth model. Based on the theoretical analysis, we investigate the impact of public service supply on haze pollution and examine the mediation effect using city-level panel data from 2005 to 2016. The results show that public service supply significant inhibits haze pollution. Compared with small and median cities, large cities exhibit a stronger reduction effect. Also, the effect of public services for infrastructure is larger than that of people’s livelihoods. Further, there exhibit regional and period differences in the haze control effect of public service supply. Public service supply affects urban haze pollution through the channels of technological progress, industrial structure and income level. On the one hand, public service supply can inhibit haze pollution by promoting technological progress and income levels. On the other hand, it can intensify haze pollution by increasing the proportion of industry. Our results broader the theoretical study of public service supply on environmental pollution, thus providing instructions for optimizing public service supply layout and promoting urban green development.