数字经济对黄河流域经济高质量发展的影响及空间溢出效应研究

The Impact of Digital Economy on High-quality Economic Development in the Yellow River Basin and Its Spatial Spillover Effect

文章基于2011-2020年黄河流域73个城市的面板数据,利用熵值法测算数字经济指数和经济高质量发展指数,采用固定效应、空间效应、中介效应和门槛效应等模型实证检验了数字经济对黄河流域城市经济高质量发展的影响。结果表明:一是数字经济可以显著推动黄河流域城市的经济高质量发展且具有一定的正向空间溢出效应。二是数字经济可以通过促进产业结构升级进而推动经济高质量发展。三是在数字经济和产业结构升级两个门槛条件下,数字经济对经济高质量发展的影响均呈现出边际效用递增的非线性效应。

Based on the panel data of 73 cities in the Yellow River Basin from 2011 to 2020,this paper calculates digital economy index and high-quality economic development index by using entropy method,and empirically tests the influence of digital economy on high-quality economic development of cities in the Yellow River Basin by using fixed effect,spatial effect,intermediary effect and threshold effect models.The results show that:Digital economy can significantly promote the high-quality economic development of cities in the Yellow River Basin and has a certain positive spatial spillover effect.Digital economy can promote high-quality economic development by promoting the upgrading of industrial structure.Under the two threshold conditions of digital economy and industrial structure upgrading,the influence of digital economy on high-quality economic development presents a nonlinear effect of increasing marginal utility.