Friendship paradox

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Friendship paradox

Summary

The friendship paradox is a mathematical and social network phenomenon stating that, on average, your friends tend to have more friends than you do. Introduced by sociologist Scott L. Feld in 1991, the idea arises from the structure of social networks: highly connected individuals are more likely to appear in other people’s friend lists, making them disproportionately represented when we look at our own connections. This does not mean that every person has fewer friends than all of their friends, but rather that the average comparison across a population produces this surprising result.

The paradox has applications beyond friendships, influencing the study of networks in fields such as epidemiology, information diffusion, and online communities. Similar effects appear in other systems where connections are unevenly distributed, such as social media followers or communication networks. Understanding the friendship paradox reveals how network structures shape our perceptions and helps researchers analyze the spread of influence, trends, and information in complex interconnected systems.


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