Improvement And Application Of Fitness-Complexity Index

In the analysis of the international trade competitiveness,the Revealed Comparative Advantage index(RCA)plays an important role in quantitative research,but the traditional RCA index only considers the exporting countries of products,but fails to indicate which country the products are finally exported to.In this paper,the traditional RCA is improved to the directional RCA considering both the export place and the import place.The fitness-complexity index is calculated by RCA with direction,and the complexity index of exporter-product and importer-product are obtained after modifying the algorithm.According to the result of complexity index of exporter-product and import-product,the exporter-product complex networks and importer-product complex networks are obtained respectively.The prediction method of RCA is also improved,and the attribute-driven graph attention neural network is introduced.Compared with the traditional prediction method,the neural network model improved the prediction accuracy.The improvement of RCA index,fitness-complexity index and RCA prediction method are fused to obtain the complex network algorithm from the perspective of economic complexity.Based on the<statistical classification of digital economy and its core industries(2021)>and the import and export data of China’s provincial customs in 2018,2019 and 2020,this paper analyzes the regional development of China’s digital product manufacturing industry and the situation of exporting countries.The integrated complex network algorithm is used to calculate the export province product complex network and import country complex network,so as to study the dynamic changes of the national community and commodity community of China’s digital product trade,this paper explores the export of digital products in China’s provinces and the exchange of digital economic products between China and other countries in the world.The study found that China’s major digital product manufacturing provinces are mainly concentrated in South China.The digital product manufacturing industries in Guangdong,Guangxi and Yunnan are relatively developed,with rich types and high complexity of exported products.Sichuan and Chongqing also exported a large number of digital products,but relatively low-end.The provinces with better development of digital product manufacturing industry in northern China are Shanxi and Xinjiang,followed by Shandong.From the perspective of countries importing China’s digital products,Australia,New Zealand,the United States and Papua New Guinea are major importing countries.Among them,Australia,New Zealand and the United States imported the largest number of products from China and covered the widest range in these three years.