Heatmap \ref{321072} Figure shows the correlation of the PageRank score between 10 countries. The figure shows that PageRank score of China and Hong Kong are moving together. While China and Hong Kong scores are moving in opposite direction of other eight countries. From 2001 to 2013 correlation between PageRank importance of China and USA is highly negatively correlated as much as 0.91. Similarly, from 2013 to 2016 China and USA has a high negative correlation, while the score for both countries has changed the direction, China’s score is decreasing and that of USA is increasing. China’s rank score is negatively correlated with not the only USA but all other 8 countries except Hong Kong. Last decade shows a strong negative correlation between PageRank score of USA and China. This shows that in the last decades, the importance of China, as indicated by PageRank, has been increasing, at the same time when the importance of all other countries has been decreasing.
Hubs
In hyperlinked environments such as World Wide Web and the WTN, a hub is a node which has may outgoing links or points to many other nodes. Hubs score represent the importance of a country from the perspectives of its strength and volume of trade export to other countries in the WTN. If a country is a major exporter to a major importer country, then the country will have a higher hubs score. Figure \ref{189429} shows the time series plots of hubs score of ten countries from 1990 to 2016. Selected ten countries to have the highest hubs score in the year 2016. With historic economic reform in 1979 and subsequent accession to the World Trade Organization China emerged as a major exporter country or hubs in the WTN (Deguchi et al., 2014). Noticeably, China’s hub score has been increasing throughout the study period and emerged as main export nations or hub. Canada, Japan, Mexico, and the USA are major hubs in WTN besides China. The figure shows variability in Hubs score at the beginning of study period during 1990’s and less variability during the end of study period. The overall picture shows converging Hubs score for all countries except China. As the hubs score of all countries sums to one, increase in hub score of China resulted in a decrease in hub score of other countries.