摘要：数字化是推动经济社会全面绿色低碳转型的重要抓手。本文推演了数字经济驱动绿色低碳转型的理论机制，基于国家数字经济创新发展试验区的准自然实验，构建双重差分模型检验了数字经济政策的碳减排效应及作用机理。结果显示，国家数字经济创新发展试验区显著降低了试点城市的碳排放量，数字经济主要通过绿色价值观和绿色技术创新促进碳减排，且在经济发展程度高和创新环境好的城市表现得更明显。进一步，构建包含政策空间溢出效应的双重差分模型对数字经济减碳效应的空间溢出程度进行检验，发现国家数字经济创新发展试验区对邻近城市形成了一个约150公里的碳减排效应辐射半径。本文研究结论为发挥 数字经济政策的减碳效应提供了充分的理论依据和可靠的实证经验。
关键词：数字经济；绿色价值观；绿色技术创新；空间溢出效应
Theoretical Mechanism and Spatial Spillover Effect of Carbon Reduction in Digital Economy: Research based on the National Pilot Zone for Innovative Development of Digital Economy
Zhu Dixing
Abstract: Digitalization is an important means to promote the comprehensive green and low-carbontransformation of the economy and society. The paper deduces the theoretical mechanism of green low-carbon transformation driven by digital economy, and based on the quasi-natural experiment of the National Pilot Zone for Innovative Development of Digital Economy, constructs a double-difference model to test the carbon emission reduction effect and the mechanism of the digital economy policy. The results show that the National Pilot Zone for Innovative Development of Digital Economy significantly reduces the carbon emissions of the pilot cities, and the digital economy promotes carbon emission reduction mainly through green values and green technological innovations, and it is more obvious in the cities with a high degree of economic development and a goodinnovation environment. Further, a double-difference model including the spatial spillover effect of the policy is constructed to test the spatial spillover degree of the carbon reduction effect of the digital economy, and it is found that the National Pilot Zone forInnovative Development of Digital Economy creates a radiation radius of carbon emission reduction of about 150 kilometers to the neighboring cities. The findings of this paper provide sufficient theoretical basis and reliable empirical experience for the carbon reduction effect of digital economy policies.
Keywords: Digital Economy; Green Values; Green Technological Innovation; Spatial Spillover Effect
