Improved algorithms for topic distillation in a hyperlinked environment
Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval
Authoritative sources in a hyperlinked environment
Journal of the ACM (JACM)
Unsupervised Learning of Finite Mixture Models
IEEE Transactions on Pattern Analysis and Machine Intelligence
Pattern Recognition with Fuzzy Objective Function Algorithms
Pattern Recognition with Fuzzy Objective Function Algorithms
Graph-based ranking algorithms for e-mail expertise analysis
DMKD '03 Proceedings of the 8th ACM SIGMOD workshop on Research issues in data mining and knowledge discovery
Expertise identification using email communications
CIKM '03 Proceedings of the twelfth international conference on Information and knowledge management
Link analysis ranking: algorithms, theory, and experiments
ACM Transactions on Internet Technology (TOIT)
Co-authorship networks in the digital library research community
Information Processing and Management: an International Journal - Special issue: Infometrics
Discovering important nodes through graph entropy the case of Enron email database
Proceedings of the 3rd international workshop on Link discovery
An objective approach to cluster validation
Pattern Recognition Letters
Expertise networks in online communities: structure and algorithms
Proceedings of the 16th international conference on World Wide Web
Finding high-quality content in social media
WSDM '08 Proceedings of the 2008 International Conference on Web Search and Data Mining
A classification-based approach to question answering in discussion boards
Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval
Socializing or knowledge sharing?: characterizing social intent in community question answering
Proceedings of the 18th ACM conference on Information and knowledge management
Expert finding in question-answering websites: a novel hybrid approach
Proceedings of the 2010 ACM Symposium on Applied Computing
Crowdsourcing human-based computation
Proceedings of the 6th Nordic Conference on Human-Computer Interaction: Extending Boundaries
Discovering Knowledge-Sharing Communities in Question-Answering Forums
ACM Transactions on Knowledge Discovery from Data (TKDD)
Evidentiality for text trustworthiness detection
NLPLING '10 Proceedings of the 2010 Workshop on NLP and Linguistics: Finding the Common Ground
Learning a user-thread alignment manifold for thread recommendation in online forum
CIKM '10 Proceedings of the 19th ACM international conference on Information and knowledge management
Expert identification in community question answering: exploring question selection bias
CIKM '10 Proceedings of the 19th ACM international conference on Information and knowledge management
On the hierarchicalness of q&a posting networks
Proceedings of the 16th ACM international conference on Supporting group work
Predicting best answerers for new questions in community question answering
WAIM'10 Proceedings of the 11th international conference on Web-age information management
Identifying topical authorities in microblogs
Proceedings of the fourth ACM international conference on Web search and data mining
Design lessons from the fastest q&a site in the west
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Modeling answerer behavior in collaborative question answering systems
ECIR'11 Proceedings of the 33rd European conference on Advances in information retrieval
Competition-based user expertise score estimation
Proceedings of the 34th international ACM SIGIR conference on Research and development in Information Retrieval
Early detection of potential experts in question answering communities
UMAP'11 Proceedings of the 19th international conference on User modeling, adaption, and personalization
A comparative assessment of answer quality on four question answering sites
Journal of Information Science
IP-QAT: in-product questions, answers, & tips
Proceedings of the 24th annual ACM symposium on User interface software and technology
Answers, not links: extracting tips from yahoo! answers to address how-to web queries
Proceedings of the fifth ACM international conference on Web search and data mining
ACM Transactions on Information Systems (TOIS)
Finding experts in tag based knowledge sharing communities
KSEM'11 Proceedings of the 5th international conference on Knowledge Science, Engineering and Management
Exploiting user profile information for answer ranking in cQA
Proceedings of the 21st international conference companion on World Wide Web
Journal of the American Society for Information Science and Technology
Vote calibration in community question-answering systems
SIGIR '12 Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval
Question routing in community based QA: incorporating answer quality and answer content
Proceedings of the ACM SIGKDD Workshop on Mining Data Semantics
Topic-sensitive probabilistic model for expert finding in question answer communities
Proceedings of the 21st ACM international conference on Information and knowledge management
Information Processing and Management: an International Journal
How many answers are enough? optimal number of answers for Q&A sites
SocInfo'12 Proceedings of the 4th international conference on Social Informatics
Context-Aware Expert Finding in Tag Based Knowledge Sharing Communities
International Journal of Knowledge and Systems Science
Online silk road: nurturing social search through knowledge bartering
Proceedings of the 2013 conference on Computer supported cooperative work
Facilitating students' collaboration and learning in a question and answer system
Proceedings of the 2013 conference on Computer supported cooperative work companion
Choosing the right crowd: expert finding in social networks
Proceedings of the 16th International Conference on Extending Database Technology
Predicting Best Responder in Community Question Answering Using Topic Model Method
WI-IAT '12 Proceedings of the The 2012 IEEE/WIC/ACM International Joint Conferences on Web Intelligence and Intelligent Agent Technology - Volume 01
Competition-based networks for expert finding
Proceedings of the 36th international ACM SIGIR conference on Research and development in information retrieval
Proceedings of the 2013 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining
CQArank: jointly model topics and expertise in community question answering
Proceedings of the 22nd ACM international conference on Conference on information & knowledge management
User profiling for answer quality assessment in Q&A communities
Proceedings of the 2013 workshop on Data-driven user behavioral modelling and mining from social media
Information Sciences: an International Journal
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We consider the problem of identifying authoritative users in Yahoo! Answers. A common approach is to use link analysis techniques in order to provide a ranked list of users based on their degree of authority. A major problem for such an approach is determining how many users should be chosen as authoritative from a ranked list. To address this problem, we propose a method for automatic identification of authoritative actors. In our approach, we propose to model the authority scores of users as a mixture of gamma distributions. The number of components in the mixture is estimated by the Bayesian Information Criterion (BIC) while the parameters of each component are estimated using the Expectation-Maximization (EM) algorithm. This method allows us to automatically discriminate between authoritative and non-authoritative users. The suitability of our proposal is demonstrated in an empirical study using datasets from Yahoo! Answers.