Identifying Multiple Userids of the Same Author

This paper studies the problem of identifying users who use multiple userids to post in social media.Since multiple userids may belong to the same author, it is hard to directly apply supervised learning to solve the problem.This paper proposes a new method, which still uses supervised learning but does not require training documents from the involved userids.Instead, it uses documents from other userids for classifier building.The classifier can be applied to documents of the involved userids.This is possible because we transform the document space to a similarity space and learning is performed in this new space.Our evaluation is done in the online review domain.The experimental results using a large number of userids and their reviews show that the proposed method is highly effective.