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  1. 1 Acta Physica Polonica A

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  1. 1 2018

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  1. 1 Lee J.

  2. 1 Nobi A.

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Structural Transformation of Minimal Spanning Trees in World Commodity Market

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Lee J., Nobi A.
Acta Physica Polonica A
|
2018
|
vol. 133
|
issue 6
1414-1416
EN
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.
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