Recently, the focus of the international business has been shifted from a country-level to a sub-national level, with the better availability of more fine-grained data and new interdisciplinary research. Especially, “global city” has become a key topic in international business due to their superior economic performance. Their superior can be explained by 1) well-developed infrastructure attracts many different people and firms to be concentrated in a dense area, and 2) global connectivity of the global cities provides access to more opportunities and knowledge outside the metropolitan area. These two factors are very closely related. World-class firms and talented people in the metropolitan area provide more chances to be connected, both within a city and across different cities across co
