智慧城市建设试点对碳排放绩效的影响研究

The Impact of Smart City Construction Pilot on Carbon Emission Performance

数字化正全面融入经济社会发展各领域和全过程,是推动我国加快发展方式绿色转型的关键力量,但政策实践效果有待检验。本文基于2008—2018年中国215个城市的面板数据,利用多期DID方法研究智慧城市建设试点政策对碳排放绩效的影响。研究结果表明:智慧城市建设试点政策有效提升了试点地区的碳排放绩效,此结论在进行了PSM-DID、随机抽取示范城市和政策实施时间、排除混淆政策因素、滞后试点政策实施时间、删减部分政策试点样本等一系列的稳健性检验后仍然成立;智慧城市建设试点政策通过促进绿色技术进步、推动产业优化升级、提升政府治理能力的渠道以实现碳排放绩效的提升;智慧城市建设试点政策对碳排放绩效的正向影响呈现出地区异质性,提升碳排放绩效效应主要体现在东部地区、高网络建设水平地区、非资源诅咒地区、非资本密集型地区、数字金融发展高水平地区、政策高执行力度地区以及偏向技术研发、数字产业、公共服务建设的地区;智慧城市建设试点政策对于提升碳排放绩效具有正向的空间溢出效应,有效提升了邻近地区的碳排放绩效。以上研究结果为智慧城市建设实现经济发展和节能减排的双赢提供了重要启示。

Digitalization and intelligence are being comprehensively integrated into all fields and processes of economic and social development,and are key forces to promote the green transformation of China's accelerated development mode,but the effect of policy practice has yet to be tested.Based on the panel data of 215 cities in China during 2008-2018,this paper investigates the impact of smart city construction pilot policies on carbon emission performance using a multi-period DID approach.The results show that the smart city construction pilot policy effectively enhances the carbon emission performance of pilot regions.Further research found that the pilot policy of smart city construction improves carbon emission performance through the channels of promoting green technology advancement,promoting industrial optimization and upgrading,and enhancing government governance capacity.The enhancement effect is mainly reflected in eastern regions,regions with high network construction level,non-resourcecursed regions,non-capital intensive regions,and regions with high level of digital financial development,with high policy implementation and regions where the type of construction favors technology research and development,digital industry,and public services.Finally,the smart city construction pilot policy has a significant positive spatial spillover effect on improving carbon emission performance,and effectively improves the carbon emission performance of neighboring regions.The research results provide important insights for smart city construction to achieve a win-win situation of economic development and energy conservation and emission reduction.