| Budget Amount *help |
¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
We established the basis of a generalized gravity-type transport model that describes the flow of money on the business relationship network between approximately 1 million companies in Japan. We established a method to estimate model parameters optimally from data, and it becomes possible to perform mathematical simulation under various scenarios such as large scale natural disasters.
Theoretical analysis and simulations have shown that increasing the power exponent of the nonlinear partition results in a new type of phase transition in which the flow of money is localized around large enterprises. In addition, we found that when the probability of merger between large companies is higher, the tendency of oligopolisticity by large companies becomes stronger, and the ecosystem will become unstable.
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