The Impact of Digital Economy Development on the Upgrading of Industrial Structure——Taking the Metropolitan Circle around the "JI" Shape Bend of the Yellow River as an Example

Based on the panel data of 19 prefecture-level cities in the Metropolitan Circle around the "ji" Shape Bend of the Yellow River from 2011 to 2022, the entropy method, CRITIC method and mean variance method are combined to measure the digital economy development level of each city in the metropolitan circle. The double fixed effect model is selected to explore the impact of the digital economy on the upgrading of the industrial structure in the Metropolitan Circle around the "ji" Shape Bend of the Yellow River, and the panel threshold model is established to analyze the nonlinear relationship between the development of the digital economy and the upgrading of the industrial structure. The results show that the digital economy has a significant positive impact on the upgrading of the industrial structure in the Metropolitan Circle around the "ji" Shape Bend of the Yellow River. From 2011 to 2016, the impact of the digital economy on the upgrading of the industrial structure is negative, while from 2017 to 2022, it is positive. Per capita GDP and urbanization play a completely mediating role in the impact of the digital economy on the upgrading of the industrial structure. There are significant nonlinear characteristics in the impact of the digital economy on the upgrading of the industrial structure, showing a trend of increasing marginal effect.