Evolution of the Network Structure of Maritime Service Trade and National Role Identification
Maritime service is the link to realize trade circulation and economic globalization.Distinguishing the actual status of maritime service trade in various countries is of practical significance to promote the virtuous cycle of trade and the stable development of shipping industry,and quantitatively identify the pattern and characteristics of maritime service trade.Therefore,this article uses the social network method to explore the topological characteristics and evolutionary laws of the global maritime service trade network.The results show that:1)In terms of the evolution of network structure characteristics,the network density increases from 0.143 to 0.241 during the sample period,and the network of maritime trade services tends to be complicated and dense,with the characteristics of core edge hierarchy,small world and polarization,while scale-free is not obvious.The Pearson correlation coefficients of node degree and strength degree are-0.4780～-0.3930 and-0.0206～-0.0155,respectively.The trade network of maritime service is a typical heterogeneous network.The frequency of appearance of GCX,F8X,and FKX motifs is relatively high in each year,export structure and reciprocal structure are the important modes of maritime service trade,while highly centralized trade mode is not prominent.2)From the perspective of each country's network status and role,core countries such as the United States,Germany and Japan play an absolute leading role in the network,South Asia is a low-value trade agglomeration area,it shows a spatial pattern dominated by Europe,Asia and North America.The node degree centrality of China and India is gradually improved,and the network status of emerging economies is obviously enhanced.Singapore is the hub of maritime service trade,Germany and the United States are major exporters of maritime service trade,Japan,the United Kingdom and Thailand tend to assume the role of import initiator,and China as the core country and intermediate node plays an important role in transmission.
maritime service tradesocial network analysisexport structurenetwork modulehierarchical structuretrade matching
NETL
NSTL
万方数据
