Jae Woo Lee, Ahadun Nobi, Le Anh Quang
We consider the structural change of the world trade flow network for different commodities from 1995 to 2013. The minimum spanning tree is generated by the trade flow and investigates the hierarchical organization of the tree by using the hierarchical path. We find that the network for man-made products such as machinery and transport equipment and manufactured goods is more hierarchical than the natural products such as mineral fuels. We also find out that the hierarchy F over time is changed notably due to globalization and crises. We observe the big role of China on world trade network in recent years.