Sustaining the environment is essential for Saudi Arabia, especially given the country's high dependence on oil rents. While these rents have historically fueled economic growth, they have also contributed significantly to environmental degradation. Sustainable resource use and a transition from...

We use anonymized data from Facebook to construct a new measure of the pairwise social connectedness between 180 countries and 332 European regions. We find that two countries trade more with each other when they are more socially connected and when they share social connections with a similar...