Sustainable Online Communities Exhibit Distinct Hierarchical Structures Across Scales of Size

TL;DR

This study reveals that sustainable online communities maintain a balanced hierarchical social structure across different size scales, and early social structure patterns can predict long-term survival.

Contribution

It demonstrates that the presence of a typical hierarchical social structure is crucial for community sustainability and introduces a method to forecast long-term survival based on early social patterns.

Findings

Communities with balanced hierarchical structures tend to survive longer.

Early social structure analysis within 30 days predicts 10-year survival.

Structural features stabilize within the first two months of community formation.

Abstract

Online communities exist in many forms and sizes, and are a source of considerable influence for individuals and organizations. Yet, there is limited insight into why some online communities are sustainable, while others cease to exist. We find that communities that fail to maintain a typical hierarchical social structure which balances cohesiveness across size scales do not survive, and can be distinguished from communities that exhibit such balance and prevail in the long term. Moreover, in an analysis of 10,122 real-life online communities with a total of 134,747 members over a period of more than a decade, we find that mapping the community social circle structure in the first 30 days of its lifetime is sufficient to forecast the survival of the community up to ten years in the future. By varying calibration time frames, the aspects of the social structure that allows for predictive power emerge and fixate within the first couple of months in a community's lifetime.