Finding influencers in networks using social capital

Karthik Subbian, Dhruv Sharma, Zhen Wen, Jaideep Srivastava

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The existing methods for finding influencers use the process of information diffusion to discover the nodes with the maximum expected information spread. These models capture only the process of information diffusion and not the actual social value of collaborations in the network. We have proposed a method for finding influencers based on the notion that people generate more value for their work by collaborating with peers of high influence. The social value generated through such collaborations denotes the individual social capital. We hypothesize and show that players with high individual social capital are often key influencers in the network. We propose a value-allocation model to compute the social capital and allocate the fair share of this capital to each individual involved in the collaboration. We show that our allocation satisfies several axioms of fairness and falls in the same class as the Myerson’s allocation function. We implement our allocation rule using an efficient algorithm SoCap and show that our algorithm outperforms the baselines in several real-life data sets. Specifically, in DBLP network, our algorithm outperforms PageRank, PMIA and Weighted Degree baselines up to 8 % in terms of precision, recall and $$F_1$$F1-measure.

Original languageEnglish (US)
Article number219
Pages (from-to)1-13
Number of pages13
JournalSocial Network Analysis and Mining
Issue number1
StatePublished - Jan 1 2014

Bibliographical note

Funding Information:
This research was sponsored by the Defense Advanced Research Project Agency (DARPA) agreement number W911NF-12-C-0028. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the DARPA or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation here on. We thank the anonymous reviewers for their valuable suggestions and comments.

Publisher Copyright:
© 2014, Springer-Verlag Wien.


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