Authors
Takumi Kato
takumikato@mail.saitama-u.ac.jp
Graduate School of Humanities and Social Sciences, Saitama University, Japan
takumikato@mail.saitama-u.ac.jp
© 2021 Takumi Kato, published by IRENET - Society for Advancing Innovation and Research in Economy
This work is licensed under the Creative Commons Attribution 4.0 License.