Research Interests

  • Virtual communities, social networks and networked economy
  • Electronic marketplaces and internet marketing
  • Data mining and business intelligence

 

 

Journal Publications and Working Papers

  • “Competition among Virtual Communities and User Valuation: The Case of Investor Communities,” with Bin Gu, Prabhudev Konana and Balaji Rajagopalan. 2007. Information Systems Research, 18(1), pp. 68-85. Best Published Paper Award.

  • “Social capital, social identity and homophily behavior in virtual communities: An analysis of user interactions in stock message boards,” with Bin Gu and Prabhudev Konana. 2009. Under review at Information Systems Research.

  • “Measuring Product Competition in Online Retailers from Revealed Preferences of Online Recommendation Networks,” with Bin Gu and Prabhudev Konana. 2009. Manuscript available; target at Information Systems Research.

  • "The Effect of Stock Message Board Co-Mentions on Lead-Lag Patterns in Stock Returns," 2009. Working paper; target at Journal of Management Information Systems.

  • "Power of Opinion Leaders: An Empirical Invetigation of Film Discussion Boards," with Akinori Ono. 2009. Working paper; target at Decision Support Systems.

     

 

Selected Conference Proceedgins and Presentations

  • “Melting-Pot or Homophily? - An Empirical Investigation of User Interactions in Virtual Investment-Related Communities," with Bin Gu and Prabhudev Konana. 2008. Workshop on Information Systems Economics (WISE 2008), Paris, France.

  • “Melting-Pot or Homophily? - An Empirical Investigation of User Interactions in Virtual Investment-Related Communities,” with Bin Gu and Prabhudev Konana. 2008. CIST 2008, Oct. 11-12, Washington D.C.

  • “Measuring Product Competition in Online Retailers from Revealed Preferences of Online Recommendation Networks,” with Bin Gu and Prabhudev Konana. 2008. INFORMS 2008, Oct. 12-15, Washington D.C.

  • “Measuring Product Competition in Online Retailers from Revealed Preferences of Online Recommendation Networks,” with Bin Gu and Prabhudev Konana. 2008. Fourth Symposium on Statistical Challenges in eCommerce Research (SCECR ‘08), May 18-19, New York City.

  • “Variance-Based Active Learning for Classifier Induction,” with Maytal Saar-Tsechansky. 2005. In

    Proceedings of the 15th Annual Workshop on Information Technologies and Systems (WITS ‘05), Dec.

    10-11, Las Vegas. (acceptance rate: 27%)

  • “Empirical Evaluation of Methods for Cost-Sensitive Direct Marketing,” with Maytal Saar-Tsechansky. 2005. In 2005 International Workshop on Customer Relationship Management: Data Mining Meets Marketing, Nov. 18-19, New York City.

  • “A Hierarchical and Multi-modal Based Algorithm for Lead Detection and News Program Narrative Parsing,” with J. Kuo, J. Kuo and J. Wu. 2005. In Proceedings of the 19th International Conference on Advanced Information Networking and Applications, pp. 511-514, Taipei, Taiwan.

  • “Action Movies Segmentation and Summarization Based on Tempo Analysis,” with J. Kuo, W. Chu and J. Wu. 2004. In Proceedings of the 6th ACM SIGMM International Workshop on Multimedia Information Retrieval (MIR ‘04), pp. 251-258, New York City.

  • “A Multi-Modal-Feature Based Algorithm for Parsing News Program Videos,” with J. Kuo, J. Yeh and J. Wu. 2003. In Proceedings of 2003 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP ‘03), pp. 177-180, Hong Kong.

  • “E-Vanguard for Emergency—A Wireless System for Rescue and Healthcare,” with S. Chen, A. Lee, K. Chao, Y. Huang and F. Lai. 2003. In Proceedings of the 5th International Workshop on Enterprise Networking and Computing in Healthcare Industry, pp. 29-35, Santa Monica, CA.