Towards a Smaller World. The distance puzzle and international border for tourism. Database

Databse for the empirical analysis of the paper Towards a Smaller World. The distance puzzle and international border for tourism用于论文《迈向更小的世界》（Towards a Smaller World）实证分析的数据库，该论文围绕距离之谜与旅游领域的国际边境展开研究