Abstract:

Taking the digital economy and integrated development as the research theme, on the basis of sorting out the theory of the impact of digital economy on integrated development, using the relevant data of various provinces, and using the spatial Durbin, threshold effect and mechanism effect models, the impact of digital economy on the development of regional integration and its internal mechanism are empirically tested. The results show that: 1) the mechanism model shows that the digital economy promotes the development of regional integration, and this promotion can be realized through the mechanism of "innovation factor flow". 2) The spatial econometric model shows that the promotion effect of the digital economy in the eastern and central regions on the development of regional integration is significantly greater than the "siphon effect" of the central cities in the region. However, the central cities in the northeast and western regions have a "siphon effect" on the peripheral cities. 3) The threshold effect model shows that when the digital economy is taken as the threshold variable, the synergistic effect of the digital economy with the "flow of innovative material elements" and "the flow of innovative human elements" on the development of regional integration will be different. ①Under the flow of innovative capital factors, the digital economy has a double threshold effect, and with the improvement of the development level of the digital economy, the synergy between it and the flow of innovative capital factors will reduce the promotion effect on the development of regional integration. ②Under the flow of innovative human factors, the digital economy has a single threshold effect, and when it is at the level of low-intensity digital economy development, the synergy between it and the flow of innovative human factors will inhibit the development of regional integration. However, when the threshold is crossed and the digital economy is at a high level of development, the synergy between it and the flow of innovative human elements will promote the improvement of the development level of regional integration.

Key words: digital economy, flow of innovation elements, integrated development, spatial Durbin model, Threshold effect model, mechanism effects

摘要： 数字经济与一体化发展作为研究的主题，在梳理数字经济影响一体化发展的理论基础上，利用各省的相关数据，运用空间杜宾、门槛效应及机制效应模型，实证检验了数字经济对于区域一体化发展的影响及内在作用机理。研究结果显示：1）机制模型显示，数字经济促进区域一体化发展，且这种促进作用可以通过“创新要素流动”机制来实现。2）空间计量模型显示，东部地区和中部地区的数字经济对区域一体化发展的促进效应明显大于该地区中心城市的“虹吸效应”；而东北地区和西部地区的中心城市对外围城市存在“虹吸效应”。3）门槛效应模型显示，当以数字经济作为门槛变量时，其与“创新物质要素流动”“创新人力要素流动”的协同对区域一体化发展的推动效应将有所不同。a.在创新资本要素流动下，数字经济存在双门槛效应，且随着数字经济发展水平的提升，其与创新资本要素流动的协同对区域一体化发展的推动效应会下降。b.在创新人力要素流动下，数字经济存在单门槛效应，且处于低强度的数字经济发展水平时，其与创新人力要素流动的协同会抑制区域一体化发展；但当跨过该门槛值，处于高强度的数字经济发展水平时，其与创新人力要素流动的协同会促进区域一体化发展水平的提升。

关键词: 数字经济, 创新要素流动, 一体化发展, 空间杜宾模型, 门槛效应模型, 机制效应