Formal models for expert finding in enterprise corpora

Krisztian Balog, Leif Azzopardi, Maarten de Rijke

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

442 Citations (Scopus)
18 Downloads (Pure)


Searching an organization's document repositories for experts provides a cost effective solution for the task of expert finding. We present two general strategies to expert searching given a document collection which are formalized using generative probabilistic models. The first of these directly models an expert's knowledge based on the documents that they are associated with, whilst the second locates documents on topic, and then finds the associated expert. Forming reliable associations is crucial to the performance of expert finding systems. Consequently, in our evaluation we compare the different approaches, exploring a variety of associations along with other operational parameters (such as topicality). Using the TREC Enterprise corpora, we show that the second strategy consistently outperforms the first. A comparison against other unsupervised techniques, reveals that our second model delivers excellent performance.
Original languageEnglish
Title of host publicationProceedings of the 29th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval
Place of PublicationNew York, NY, USA
Number of pages8
Publication statusPublished - 2006


  • enterprise search
  • expert finding
  • information retrieval


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