【摘要】 数字经济与生态环境是关乎中国式现代化发展的重要议题。本文从数字产业化与产业数字化两个维度，运用熵权法对中国30个省（区、市）2011—2021年数字经济发展水平进行测度，并利用双向固定效应、门槛效应等方法实证分析了数字经济对生态效率的影响。研究发现：数字经济显著促进了生态效率的提升，且这一结论通过了工具变量法、调整样本期和改变模型设定等稳健性检验；数字经济对生态效率的促进效应具有非线性关系，存在以数字经济、环境规制强度为门槛变量的单一门槛效应；进一步的异质性分析表明，数字经济对生态效率的促进效应、单一门槛效应以及“边际效应”递增的非线性特征在南方地区和不同数字经济维度下显著。最后，根据研究结论就如何发展数字经济提升生态效率的路径提出政策建议。更多还原

【Abstract】 Digital economy and ecological environment are important issues related to the development of Chinese modernization. From the two dimensions of digital industrialization and industrial digitalization, this paper uses the entropy weight method to measure the development of digital economy in 30 provinces(autonomous regions and municipalities) in China from 2011 to 2021,and empirically analyzes the impact of digital economy on eco-efficiency by using two-way fixed effect and threshold effect. It is found that the digital economy significantly promotes the improvement of eco-efficiency, and this conclusion passes the robustness tests such as instrumental variable method,adjusting the sample period and changing the model setting. The promotion effect of digital economy on eco-efficiency is a nonlinear relationship, and there is a single threshold effect with digital economy and environmental regulation intensity as threshold variables. Further heterogeneity analysis shows that the promotion effect of digital economy on eco-efficiency, the single threshold effect and the increasing nonlinear characteristics of “marginal effect” are significant in the southern region and different digital economy dimensions. Finally, according to the research conclusions, policy suggestions are put forward on how to develop the digital economy and improve the eco-efficiency.更多还原