Structural Transformation of Minimal Spanning Trees in World Commodity Market |
| J.W. Leea, A. Nobib
aDepartment of Physics, Inha University, Incheon, Korea bDepartment of Computer Science and Telecommunication Engineering, Noakhali Science and Technology University, Sonapur, Bangladesh |
| Full Text PDF |
| We consider structural change of a world trade-flow network for different commodities from 1995 to 2013. A minimum spanning tree is generated from the trade flow data, and we investigate the hierarchical organization of the tree by changing the hub node. Only a few countries are the hub nodes for many of the commodities. We observed the structural transitions, from a chain-like tree (many countries are hub nodes) to a bi-starlike tree (only two countries are hub nodes). In the bi-starlike tree, China and Germany are the only two hub nodes. |
DOI:10.12693/APhysPolA.133.1414 PACS numbers: 89.20.-a, 89.65.Gh, 89.75.-k |