長江經濟帶數字經濟時空演變、區域差異及空間收斂

[摘 要：數字經濟是新時代推動質量變革與新舊動能轉換的重要抓手。文章采用熵值法對2011—2019年長江經濟帶108個地級及以上城市數字經濟發展水平進行測度，并基于核密度估計法、自然間斷點分類法和Dagum基尼系數對城市數字經濟發展水平的時空演變特征和區域差異進行分析，最后利用空間杜賓模型檢驗其收斂趨勢。研究發現：長江經濟帶城市數字經濟發展水平持續增強，上中下游地區間具有顯著的梯級效應；長江經濟帶數字經濟發展水平的空間異質性特征突出，總體差異主要源于區域間的差異；長江經濟帶整體和上中下游地區均存在絕對β收斂和條件β收斂，且存在顯著的正向空間溢出效應，但不同地區收斂速度有所差異。

關鍵詞：數字經濟；時空演變；區域差異；空間收斂；長江經濟帶

中圖分類號：F49" " " " 文獻標識碼：A 文章編號：1007-5097（2023）04-0024-11 ]

Research on the Spatial-temporal Evolution，Regional Difference，

and Spatial Convergence of Digital Economy in the Yangtze River Economic Belt

GUO Bingnan，WANG Yu，ZHANG Hao

（School of Humanity amp; Social Sciences，Jiangsu University of Science and Technology，Zhenjiang 212003，China）

Abstract：Digital economy is an important tool for promoting quality reform and replacing old drivers of growth in the new era. In this paper，the entropy method is used to measure the digital economy development level of 108 cities at prefecture level and above in the Yangtze River economic belt from 2011 to 2019. Based on the kernel density estimation method，the natural discontinuities classification method， and Dagum Gini coefficient，the spatial and temporal evolution characteristics and regional differences of urban digital economy development level are analyzed. Finally，the spatial Dubin model is used to test the convergence trend. The results show that the urban digital economy development level in the Yangtze River economic belt has been continuously enhanced，and there is a significant cascade effect between the upper，middle，and lower reaches；the spatial heterogeneity of digital economy development level in the Yangtze River economic belt is prominent，and the overall difference is mainly due to regional differences；absolute β convergence and conditional β convergence exist in the whole Yangtze River economic belt and in the upper，middle，and lower reaches of the Yangtze River，and there are significant positive spatial spillover effects，but the convergence rates are different in different regions.

Key words：digital economy；spatial-temporal evolution；regional differences；spatial convergence；Yangtze River Eco?nomic Belt

一、引言及文獻綜述

隨著大數據、人工智能、云計算和區塊鏈等信息技術的快速發展及其與經濟運行的深度融合，全球各國正面臨著一場深刻的信息技術革命，數字經濟無疑成為當前最具活力、最具創新力、輻射最廣泛的經濟形態。黨的十八大以來，黨中央高度重視數字經濟發展，并將其上升為國家戰略。2022年1月國務院印發的《“十四五”數字經濟發展規劃》提出，推動數字經濟健康發展，發揮數字經濟特征優勢，構建數字中國。習近平總書記在黨的二十大報告中也強調：“加快發展數字經濟，促進數字經濟和實體經濟深度融合，打造具有國際競爭力的數字產業集群?！?br>