数字基础设施建设对城市碳生产率的影响研究——来自“宽带中国”的经验证据  

Impact of Digital Infrastructure Construction on Urban Carbon Productivity:Evidence from the"Broadband China"Initiative

作　　者：彭文斌[1] 曹笑天 PENG Wenbin;CAO Xiaotian(School of Business,Hunan University of Science and Technology,Xiangtan Hunan 411201;School of Economic Geography,Hunan University of Finance and Economics,Changsha Hunan 410205)

机构地区：[1]湖南科技大学商学院,湖南湘潭411201 [2]湖南财政经济学院经济地理学院,湖南长沙410205

出　　处：《经济纵横》2024年第8期94-105,共12页Economic Review Journal

基　　金：国家自然科学基金面上项目“空间异质性视域下环境规制对绿色创新的影响效应与调控路径研究”(编号:42071161);国家自然科学基金面上项目“空间网络视域下城市更新对生态韧性的影响机理与调控路径研究”(编号:42371192);湖南省研究生科研创新项目“环境规制影响企业碳绩效的机理与政策研究”(编号:CX20221046);湖南省社会科学基金重大项目“数字湖南建设研究”(编号:23ZDAJ023);湖南省社会科学基金一般项目“制造业绿色转型的机理与政策研究”(编号:23YBA133)的成果;湖南省自然科学基金项目“长株潭都市圈城市更新对生态韧性的影响机理与提升策略”(编号:2023JJ30100)。

摘　　要：数字经济的蓬勃发展为碳减排提供了新引擎,数字基础设施作为大数据、人工智能和5G等新兴技术的实际载体,其建设与完善对于推动“双碳”目标的实现具有深远意义。基于此,文章以“宽带中国”示范城市建设作为准自然实验,采用2009—2019年全国283个城市的面板数据,构建多期双重差分模型和空间双重差分模型,考察数字基础设施建设对碳生产率的影响及其空间溢出效应。研究发现,数字基础设施建设能促进城市碳生产率的提升,且具有正向的空间溢出效应;数字基础设施建设通过提高城市创新水平促进绿色技术进步、产业结构优化和能源利用效率提升,进而提高碳生产率。因此,建议加快推动数字基础设施建设,贯彻数字中国战略;激发绿色创新动力,强化空间溢出效应;建立协同治理机制,促进数字经济联动发展。The booming of the digital technology and the digital economy has created a new engine for car-bon emission reduction.As a practical carrier of emerging technologies such as big data,artificial intelligence,and 5G,digital infrastructure has profound significance for the achievement of carbon peaking and carbon neu-trality.With the panel data from 283 cities for demonstration of the“Broadband China"initiative from 2009 to 2019,a multi-period difference-in-differences(DiD)model and a spatial DiD model are established to exam-ine the impact of digital infrastructure construction on carbon productivity and the spatial spillover effects.The results showcase that digital infrastructure construction improves urban carbon productivity and has a positive spatial spillover effect.Specifically,digital infrastructure construction promotes the progress in green technol-ogy,the optimization of industrial structure,and the improvement of energy efficiency by boosting urban inno-vation,thereby improving carbon productivity.The promoting effect of digital infrastructure construction on carbon productivity is more significant in the cities that are not in the Yangtze River Economic Belt,non-resource-based cities,and large cities.According to the results,this paper put forward the following sugges-tions:accelerating the digital infrastructure construction and implementing the Digital China initiative;releas-ing momentum for green innovation and strengthening spatial spillover effects;establishing a collaborative gov-ernance mechanism to promote the coordinated development of the digital economy.

关 键 词：数字基础设施建设 “宽带中国” 碳生产率 

分 类 号：F832.51[经济管理—金融学]