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Surfing a web of trust: Reputation and reciprocity on Couchsurfing.com

by Debra Lauterbach, Hung Truong, Tanuj Shah, Lada Adamic
Proceedings - 12th IEEE International Conference on Computational Science and Engineering, CSE 2009 ()

Abstract

Reputation mechanisms are essential for online transactions, where the parties have little prior experience with one another. This is especially true when transactions result in offline interactions. There are few situations requiring more trust than letting a stranger sleep in your home, or conversely, staying on someone elsepsilas couch. Couchsurfing.com allows individuals to do just this. The global CouchSurfing network displays a high degree of reciprocal interaction and a large strongly connected component of individuals surfing the globe. This high degree of interaction and reciprocity among participants is enabled by a reputation system that allows individuals to vouch for one another. We find that the strength of a friendship tie is most predictive of whether an individual will vouch for another. However, vouches based on weak ties outnumber those between close friends. We discuss these and other factors that could inform a more robust reputation system.

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