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Correlated performance of firms in a transaction network |
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| Authors: | Yuichi Ikeda Hideaki Aoyama Hiroshi Iyetomi Yoshi Fujiwara Wataru Souma |
| Affiliation: | (1) Hitachi Research Institute, 4-14-1 Soto-kanda, Chiyoda-ku, Tokyo 101-8010, Japan;(2) Department of Physics, Kyoto University, Kyoto 606-8501, Japan;(3) Department of Physics, Niigata University, Ikarashi, Niigata, 950-2181, Japan;(4) NiCT/ATR CIS, Applied Network Science Lab, 2-2-2 Hikari-dai, Seika-chou, Kyoto 619-0288, Japan |
| Abstract: | The correlation of firms’ performance on a transaction network is studied by analyzing financial and transaction data. Statistically significant correlation coefficients are obtained as evidence for the firm interactions. The firm interactions are taken into account in the basic equation of firm activity. Forty percent of residuals are explained by considering the firm interactions. The overall structure of the transaction network, i.e., the connectivity of industry sectors, is analyzed. |
| Keywords: | Complex network Firm activity Network growth Connectivity Econophysics |
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