Benjamin V. Hanrahan, Gregorio Convertino, Les Nelson. Modeling problem difficulty and expertise in stackoverflow. In Steven E. Poltrock, Carla Simone, Jonathan Grudin, Gloria Mark, John Riedl, editors, CSCW '12 Computer Supported Cooperative Work, Seattle, WA, USA, February 11-15, 2012 - Companion Volume. pages 91-94, ACM, 2012. [doi]
Abstract is missing.