Abstract: By measuring the digital economy development index and industrial structure optimization index of 30 provinces in China from 2011 to 2019, this paper empirically analyzes the transmission mechanism, impact effect and spatial evolution relationship of digital economy on regional industrial structure optimization . It finds that digital economy has significantly promoted the optimization of regional industrial structure, which is still valid after the robustness test. Mechanism analysis shows that the development of digital economy promotes the optimization of regional industrial structure by improving the level of innovation ability. Threshold effect model and spatial model indicate that digital economy has the characteristics of non-linear and spatial spillover the optimization of regional industrial structure. The research of this paper provides new idea for further understanding the effect, mechanism and spatial difference of digital economy promoting regional industrial structure optimization.

Key words: Digital Economy, Regional Industrial Structure Optimization, Innovation Ability, Spillover Effect

摘要： 本文测度2011—2019年我国30个省份的数字经济发展指数和地区产业结构优化指数,运用双向固定效应模型、中介效应模型、门槛效应模型及空间杜宾模型,实证分析数字经济发展对地区产业结构优化的传导机制、影响效应及空间演化关系。研究结果显示,数字经济发展显著促进地区产业结构优化,经双重差分法等稳健性检验后结论依然成立;数字经济发展通过提高创新能力水平进而推动地区产业结构优化,门槛效应模型和空间杜宾模型检验发现数字经济发展对地区产业结构优化具有非线性特征及空间溢出特点。本研究为深入理解数字经济发展增进地区产业结构优化的效果、机制及空间差异等提供了新思路。

关键词: 数字经济, 地区产业结构优化, 创新能力, 溢出效应