Human group formation in online guilds and offline gangs driven by common team dynamic
Neil F. Johnson, Chen Xu, Zhenyuan Zhao, Nicolas Ducheneaut, Nicholas, Yee, George Tita, Pak Ming Hui

TL;DR
This paper uncovers a common team dynamic model that explains both online guilds and offline gangs, revealing a surprising quantitative link between these human groups despite their differences.
Contribution
It introduces a unified team-based model that accurately reproduces the dynamics of both online and offline human groups, challenging homophily-based explanations.
Findings
A common model fits both online and offline group data
Adjusting tolerance and attribute range reproduces different group behaviors
No evidence supports a homophily-based model for these groups
Abstract
Quantifying human group dynamics represents a unique challenge. Unlike animals and other biological systems, humans form groups in both real (offline) and virtual (online) spaces -- from potentially dangerous street gangs populated mostly by disaffected male youths, through to the massive global guilds in online role-playing games for which membership currently exceeds tens of millions of people from all possible backgrounds, age-groups and genders. We have compiled and analyzed data for these two seemingly unrelated offline and online human activities, and have uncovered an unexpected quantitative link between them. Although their overall dynamics differ visibly, we find that a common team-based model can accurately reproduce the quantitative features of each simply by adjusting the average tolerance level and attribute range for each population. By contrast, we find no evidence to…
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