• ISSN: 2010-023X (Print)
    • Abbreviated Title: Int. J. Trade, Economics and Financ.
    • Frequency: Quaterly
    • DOI: 10.18178/IJTEF
    • Editor-in-Chief: Prof.Tung-Zong (Donald) Chang
    • Managing Editor: Ms. Shira. W. Lu
    • Abstracting/ Indexing:  Crossref, Electronic Journals Library , EBSCO
    • E-mail: ijtef.editorial.office@gmail.com
HOME > Archive > 2020 > Volume 11 Number 6 (Dec. 2020) >
IJTEF 2020 Vol.11(6): 150-155 ISSN: 2010-023X
DOI: 10.18178/ijtef.2020.11.6.681

Classification of Japanese Electrical Equipment Manufacturing Industry Recovery Patterns after Disasters: Case Study of August 2019

Kenji Yamaguchi and Yukari Shirota

Abstract—In the paper, we analyze the recovery pattern of Japanese electrical equipment manufacturing companies after the President Trump remark in August 2019. The President’s remark made the companies’ stock prices decreased severely. The research consists of two parts. In the first part, we conducted Random Matrix Theory to extract representative decline/recovery patterns. Then we tagged A/B/C/D to the companies’ recovery types. The class A means a strong recover power. Then as the second part, we conducted machine learning tree-based classification using the tags A/B/C. The predictors are eight variables like ROA, ROE, and VAR. The resultant Decision Tree model provided us with the two different approaches to the class A group. The recovery and repulsion power will be higher in the company with high ROA and in the company that manufactured the product with high VAR. In addition, another class A company group is made and the feature is the high inventory turnover ratio.

Index Terms—Disaster impact on stock prices, Us-China trade friction, random matrix theory, singular value decomposition, disaster impact network.

K. Yamaguchi is with Science & Education Center (SEC), Ochanomizu University, Japan (e-mail: yamaguchi.kenji@ocha.ac.jp).
Y. Shirota is with the Faculty of Economics, Gakushuin University, Japan (e-mail: yukari.shirota@gakushuin.ac.jp).

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Cite: Kenji Yamaguchi and Yukari Shirota, "Classification of Japanese Electrical Equipment Manufacturing Industry Recovery Patterns after Disasters: Case Study of August 2019," International Journal of Trade, Economics and Finance vol.11, no.6, pp. 150-155, 2020.

Copyright © 2020 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

 

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