1. Sanghoon Lee, Department of Business Administration, College of Business & Economics, Hannam University, 70 hannam-ro, Daedeok-gu, Daejeon 34430, Republic of Korea.
2. Sunyoung Yun, Department of Industrial Strategy, Samsung Economic Research Institute, 74 seochodae-ro, Seocho-gu, Seoul 06620, Republic of Korea.