Research Papers

Empirical Analysis of Firm-Dynamics on Japanese Inter-firm Trade Network

Proceedings of the International Conference on Social Modeling and Simulation; and Econophysics Colloquium 2014

We analyze Japanese inter-firm trade network data for 20 years from the viewpoint of the metabolism of scale-free network evolution. We find that the preferential attachment effect of established firms is stronger than that of merged firms. This shows that merging firms should choose counterparties using delicate business strategies that may not be related to the degree. We also find that the distribution of lifespan of links is approximated well by an exponential function with the characteristic time of 6 years. The results imply the link creation and deletion is well characterized by a Poisson process.

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Tokyo Institute of Technology
Hayato Goto, Hideki Takayasu, and Misako Takayasu

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