TY - GEN
T1 - Network Shapley-Shubik Power Index
T2 - 8th International Conference on Complex Networks and their Applications, COMPLEX NETWORKS 2019
AU - Mizuno, Takayuki
AU - Doi, Shohei
AU - Kurizaki, Shuhei
N1 - Funding Information:
This work was partially supported by JSPS KAKENHI Grant Numbers 18H03627 and 16H05904.
Publisher Copyright:
© 2020, Springer Nature Switzerland AG.
PY - 2020
Y1 - 2020
N2 - Extending the Shapley-Shubik power index to networks, we propose a new measure and numerical method to calculate the indirect influence of investors on companies: Network power index (NPI). While the original index, reflecting the characteristics of majority vote in a shareholders meeting, measures the direct voting power of a shareholder, NPI captures not only an investor’s direct influence over a company but also indirect influence over this company’s subsidiary. Since NPI is often incalculable in a large network, we present a new method to numerically compute NPI: label propagation. Applying this method to the global shareholding networks in 2016, we find NPIs and raw vote shares dramatically diverge for some investors and this discrepancy suggests the difference in investment strategies between governments and private financial institutions.
AB - Extending the Shapley-Shubik power index to networks, we propose a new measure and numerical method to calculate the indirect influence of investors on companies: Network power index (NPI). While the original index, reflecting the characteristics of majority vote in a shareholders meeting, measures the direct voting power of a shareholder, NPI captures not only an investor’s direct influence over a company but also indirect influence over this company’s subsidiary. Since NPI is often incalculable in a large network, we present a new method to numerically compute NPI: label propagation. Applying this method to the global shareholding networks in 2016, we find NPIs and raw vote shares dramatically diverge for some investors and this discrepancy suggests the difference in investment strategies between governments and private financial institutions.
KW - Complex networks analysis
KW - Indirect control
KW - Shareholding networks
KW - The Shapley-Shubik power index
UR - http://www.scopus.com/inward/record.url?scp=85087867292&partnerID=8YFLogxK
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U2 - 10.1007/978-3-030-36683-4_49
DO - 10.1007/978-3-030-36683-4_49
M3 - Conference contribution
AN - SCOPUS:85087867292
SN - 9783030366827
T3 - Studies in Computational Intelligence
SP - 611
EP - 619
BT - Complex Networks and Their Applications VIII - Volume 2 Proceedings of the 8th International Conference on Complex Networks and Their Applications COMPLEX NETWORKS 2019
A2 - Cherifi, Hocine
A2 - Gaito, Sabrina
A2 - Mendes, José Fernendo
A2 - Moro, Esteban
A2 - Rocha, Luis Mateus
PB - Springer
Y2 - 10 December 2019 through 12 December 2019
ER -