Are Twitter "likes" indicative of meaningful relationships? A new study proposes a new way to measure social media's impact on nation brands. 

Mexican Foreign Service Diplomat Felipe Carrera explains how Cirque Du Soleil's Luzia helps foster understanding of Mexican culture. 

The Bureau International des Expositions interviews three experts to gain their insights into why World Expos are ideal venues for public diplomacy and nation branding.

This Week in PD, we share news on soft power, cultural diplomacy, nation branding and more.