Spatial agglomeration characteristics of service industry in xinjiekou CBD of nanjing city and change: Based on micro enterprise data

Abstract

The classic theory of central business district (CBD) internal industry spatial distribution originated from the west, and its applicability in China needs to be tested empirically. Based on the micro enterprise data from 2000 to 2018 classified by machine learning, this study analyzed the industrial structure, agglomeration degree, spatial distribution characteristics, and so on in order to explore the spatial and temporal change and spatial agglomeration characteristics of service industry in Xinjiekou, a typical urban center CBD in China. The results show that: 1) The change of service industry structure in Xinjiekou shows that the number of productive services continues to lead, the growth rate of circulation services has slowed down, and the gap between consumer services and information services has widened. There is no trend of specialization in general; in comparison with the whole city, consumer services have stronger comparative advantages, and the advantages expanded over time. 2) The extent of agglomeration is divided. The change of the extent of industry agglomeration is reflected in the overall agglomeration of consumer service industry, social service industry, and information service industry, among which the highest extent of agglomeration is in catering, entertainment, and residential service industries. The retail industry is experiencing decentralization and shows an opposite trend compared with catering, entertainment, and residential services. The productive service industry has polarized. The financial service industry shows the trend of agglomeration and the research and development (R&D) and design service industry is experiencing decentralization. 3) The change of spatial distribution shows the trend of double zonal contraction as a whole. Productive service industry and consumer service industry are highly coupled. The cluster center of social service industry tends to move to the core, and circulation service industry and information service industry are gathering in the outer circle.