http://www.management.wharton.upenn.edu/guillen/Distance_Data_Downloads.htm 虽然回答的有点晚…数据近更新到2015
参考文献:Heather Berry, Mauro F Guillén, & Nan Zhou. (2010). An institutional approach to cross-national distance. Journal of International Business Studies, 41(9), 1460–1480. https://doi.org/10.1057/jibs.2010.28