papers
The Way I Talk to You: Sentiment Expression in an Organizational Context.
Proceeding of the ACM Conference on Human Factors in Computing Systems (CHI), 2012.
Best Theme Paper
Collaborating Globally: Culture and Organizational Computer-Mediated Communications.
Proceeding of the International Conference on Information Systems (ICIS), 2011, Shanghai, China.
Culture Matters: A Survey Study of Social Q&A Behavior.
Proceeding of the International AAAI Conference on Weblogs and Social Media, 2011, Spain.
Honorable Mention for Best Paper
Virtual Gifts and Guanxi: Supporting Social Exchange in a Chinese Online Community.
Proceeding of ACM Conference on Computer Supported Cooperative Work (CSCW), 2011.
Diffusion Dynamics of Games on Online Social Networks.
Proceeding of ACM Workshop of Online Social Networks, 2010, Boston.
Activity Lifespan: An Analysis of User Survival Patterns in Online Knowledge Sharing Communities.
Proceeding of the International AAAI Conference on Weblogs and Social Media, 2010, Washington DC.
Comparing Information Diffusion Structure in Weblogs and Microblogs.
Proceeding of the International AAAI Conference on Weblogs and Social Media (short paper), 2010, Washington DC.
Predicting the Speed, Scale, and Range of Information Diffusion in Twitter. 
Proceeding of the International AAAI Conference on Weblogs and Social Media (short paper), 2010, Washington DC.
Democracy and Diversity in Wikipedia: A Social Network Analysis on Users' Contribution Dynamics.
In the Conference of International Communication Association, 2010, Singapore.
Individual Focus and Knowledge Contribution. 
First Monday, March, 2010.
Mi-Fresh: Promoting Local Produce Consumption. 

In Proceeding of CHI extended abstract, 2009, Boston.
Seeking and Offering Expertise across Categories: A Sustainable Mechanism Works for Baidu Knows.
In Proceeding of the International AAAI Conference on Weblogs and Social Media, 2009, San jose.
Crowdsourcing and Knowledge Sharing: Strategic User Behavior on Taskcn. 

In Proceeding of ACM Conference on Electronic Commerce, 2008, Chicago.
Competing to Share Expertise: the Taskcn Knowledge Sharing Community.
In Proceeding of the International AAAI Conference on Weblogs and Social Media, 2008, Seattle.
workshop
Crowdsourcing with All-pay Auctions: a Field Experiment on Taskcn.
In Workshop on Information Systems and Economics, Shanghai, 2011.
Predicting the Speed, Scale, and Range of Information Diffusion in Twitter.
In University of Michigan Workshop on Data, Text, Web, and Social Network Mining, 2010, Ann Arbor, MI.
Diffusion Dynamics of Games on Online Social Networks.
In Human Computer Interaction workshop (HCIC) as invited graduate student, 2010, Colorado.