About the Authors

Taiga Saito

Contributed equally to this work with: Taiga Saito, Akihiko Takahashi

Roles Investigation, Methodology, Writing – original draft, Writing – review & editing

taiga.saito@r.hit-u.ac.jp

Affiliation Graduate School of Economics, Hitotsubashi University, Tokyo, Japan

Akihiko Takahashi

Contributed equally to this work with: Taiga Saito, Akihiko Takahashi

Roles Conceptualization, Investigation, Methodology, Writing – original draft, Writing – review & editing

Affiliation School of Interdisciplinary Mathematical Sciences / Graduate School of Advanced Mathematical Sciences, Meiji University, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.