1. College of Economics, Aoyama Gakuin University, 4-25-25 Shibuya, Shibuya-ku, Tokyo, 150-8366, Japan
2. Osaka School of International Public Policy, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
3. Institute of Developing Economies, Japan External Trade Organization (IDE-JETRO), 3-2-2, Wakaba, Mihama-ku, Chiba-shi, Chiba 261-8545, Japan