The Impact of Boundary Spanning Scholarly Publications and Patents, Shi, Xiaolin, Adamic Lada A., Tseng Belle L., and Clarkson Gavin S. , PLoS ONE, 08/2009, Volume 4, Issue 8, p.e6547, (2009)

Surfing a web of trust: reputation and reciprocity on CouchSurfing.com, Lauterbach, Debra, Truong Hung, Shah Tanuj, and Adamic Lada A. , International Symposium on Social Intelligence and Networking (SIN-09), 08/2009, Vancouver, Canada, (2009)

Social Influence and the Diffusion of User Created Content, Bakshy, Eytan, Karrer Brian, and Adamic Lada A. , Electronic Commerce, Stanford, CA, (2009)

Information Diffusion in Computer Science Citation Networks, Shi, Xiaolin, Tseng Belle, and Adamic Lada A. , ICWSM, (2009)

Computational Social Science, Lazer, David, Pentland Alex, Adamic Lada A., Aral Sinan, Barabasi Albert-Laszlo, Brewer Devon, Christakis Nicholas, Contractor Noshir, Fowler James, Gutmann Myron, et al. , Science, 02/2009, Volume 323, Issue 5915, p.721 - 723, (2009)

Questions in, Knowledge iN? A Study of Naver's Question Answering Community, Nam, Kevin K., Ackerman Mark S., and Adamic Lada A. , CHI'09, 09/2008, Boston, MA, (2009)

The very small world of the well-connected, Shi, X., Bonner M., Adamic Lada A., and Gilbert A. C. , Proceedings of the nineteenth ACM conference on Hypertext and hypermedia, p.61-70, (2008)

Crowdsourcing and Knowledge Sharing: Strategic User Behavior on Taskcn, Yang, Jiang, Adamic Lada A., and Ackerman Mark S. , EC'08, 07/2008, Chicago, IL, (2008)

Knowledge Sharing and Yahoo Answers: Everyone Knows Something, Adamic, Lada A., Zhang Jun, Bakshy Eytan, and Ackerman Mark S. , WWW2008, (2008)

Competing to Share Expertise: the Taskcn Knowledge Sharing Community, Yang, Jiang, Adamic Lada A., and Ackerman Mark S. , ICWSM2008, 04/2008, Seattle, WA, (2008)

When users compete in completing online tasks, we can infer the difficulty of the tasks and the expertise levels of the users by constructing expertise networks.