MIT Technology review writes about the friendship paradox and the related majority illusion for social networks. It explains “the friendship paradox: on average your friends will have more friends than you do. This comes about because the distribution of friends on social networks follows a power law. So while most people will have a small number of friends, a few individuals have huge numbers of friends. And these people skew the average.”

It also explains “the majority illusion—the local impression that a specific attribute is common when the global truth is entirely different. … The majority illusion occurs when the most popular nodes [see below] are colored. Because these link to the greatest number of other nodes, they skew the view from the ground, as it were. That’s why this illusion is so closely linked to the friendship paradox.”

Majority illussion