关键词: 区域经济差距, 协调发展, 绝对离差法, 时空异质性, 门槛效应

Abstract: Revealing the temporal-spatial evolution characteristics of China's regional economic disparities，identifying key factors affecting regional economic development，and providing path choices for promoting coordinated regional economic development are important elements in achieving the goal of common prosperityThis article tentatively combines the policy shift，historical evolution，and quantitative measurement of China's regional economic development，and explores the evolution characteristics and sources of regional economic disparitiesMoreover，this paper explores the nonlinear and spatial radiation effects of economic development，industrial structure upgrading，and urbanization on regional economic disparities within the same research framework for causal analysisThere is a trend of fluctuation and narrowing in terms of the difference of regional economy since the founding of the People's Republic of China in 1949，and it has a cyclical featureIn space，the difference of regional economy is characterized by a decreasing distribution in the east，the middle，and the west，and the gap between the east region and the middle and west region is the key to affecting the relative equilibrium of the regional economyFurther research shows that when the economic development reaches a certain level，the regional economic gap can be effectively narrowed by promoting the upgrading of industrial structure and the construction of new urbanizationThe effect of new urbanization is mainly reflected by the spatial radiation between regions，and the effect of industrial structure upgrading is mainly reflected through internal regional economic development

Key words: regional economic gap, coordinated development, absolute deviation method, temporal-spatial heterogeneity, threshold effect