网络嵌入对中国沿海城市海洋经济外向服务功能的影响OA

Under the background of the"space of flows"reshaping the spatial organization of the marine economy,it is crucial to identify the evolutionary characteristics and network-driven mechanisms of coastal city functions.Utilizing multi-dimensional flow data of the marine economy from Chinese coastal cities in 2017 and 2022,this study improves the outward service function measurement model by introducing a network efficiency factor.It classifies hierarchical echelons and factor-dominant types,and constructs a regression model to explore the influence mechanisms of network embeddedness on the outward service functions of China's coastal cities.The findings indicate that:(1)The outward service energy levels of coastal cities exhibit a significant"pyramid-shaped"echelon pattern;core cities are mostly characterized as multi-factor-driven,while middle-and-low-level cities rely on single factors.(2)Network embeddedness is the core variable driving functional improvement.(3)Structural advantage in the network triggers a"functional spillover and transfer loss"effect,exerting a negative impact on the functional enhancement of coastal hub cities.(4)Heterogeneity analysis reveals that the promotion effect of network embeddedness on lower-level cities is significantly superior to that on higher-level cities;integrating into the network is a key path for peripheral cities to achieve functional breakthroughs.