About the Authors

Yuichiro Yasui

Roles Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing

y-yasu@ism.ac.jp

Affiliation Department of Statistical Science, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies, SOKENDAI, Tokyo, Japan

Junji Nakano

Roles Methodology, Supervision, Writing – review & editing

Affiliation Department of Global Management, Chuo University, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.