中国网络基础设施建设的碳减排效应研究--基于“宽带中国”战略的准自然实验

Carbon Reduction Effect of Network Infrastructure Construction in China:A Quasi-natural Experiment Based on the“Broadband China”Strategy

当前中国经济已进入高质量发展阶段,节能减排已成为经济高质量发展的内在要求。论文立足数字经济时代背景,基于2006—2019年中国271个地级市面板数据,采用倾向得分匹配与双重差分法相结合来分析“宽带中国”战略对碳减排效应的影响。研究发现:(1)“宽带中国”战略显著促进了碳减排效应,但是空间效应分析发现“宽带中国”战略的实行提高了相邻城市的二氧化碳排放量。(2)区域异质性分析发现,“宽带中国”战略在促进碳减排效应的同时增加了成熟型城市和中国西部城市的二氧化碳排放量。(3)城市产业结构和技术创新是“宽带中国”战略影响碳减排效应的重要途径。

As China’s economy has entered a stage of high-quality development,energy conservation and emission reduction have become an inherent requirement of high-quality economic development.Based on the panel data of 271 prefecture-level cities in China from 2006 to 2019,this paper analyzes the impact of“Broadband China”strategy on carbon emission reduction by using the combination of propensity score matching and differential difference method.The results show that:(1)The strategy of“Broadband China”significantly promotes the carbon emission reduction effect,but the spatial effect analysis shows that the implementation of“Broadband China”strategy increases the carbon dioxide emission of neighboring cities.(2)Regional heterogeneity analysis shows that“Broadband China”strategy promotes carbon emission reduction effect while increasing carbon dioxide emissions in mature cities and western cities of China.(3)Urban industrial structure and technological innovation are important ways for“Broadband China”strategy to influence carbon emission reduction.