Power users and diversity in WikiProjects: In a recent paper, Jacob Solomon and Rick Wash investigate the question of sustainability in online communities by analysing trends in the growth of WikiProjects.

User influence on site policies: Wikipedia vs. Facebook vs. Youtube: Laura Stein, a researcher at the University of Texas at Austin, has concluded that, based on her comparison of user policy documents (including the Terms of Service) of YouTube, Facebook and Wikipedia, Wikipedia offers the highest level of participation power overall.

98 registered participants attended the annual WikiSym+OpenSym conference from August 5-7 at Hong Kong's Cyberport facility.

An ArXiv preprint titled "Highlighting entanglement of cultures via ranking of multilingual Wikipedia articles" is about the Wikipedia articles on individuals and their position in the hyperlink network of the articles in each Wikipedia language edition, considering the whole hyperlink network.

A comparative work by T. Yasseri., A. Spoerri, M. Graham and J. Kertész looks at the 100 most controversial topics in 10 language versions of Wikipedia, and tries to make sense of the similarities and differences in these lists.

An article in Library Review offers a much-needed comparison of data from a population of editors outside the English Wikipedia.

Sentiment monitoring; UNESCO and systemic bias; and more: A report on an online service which was created to conduct real-time monitoring of Wikipedia articles of companies, and more.

A paper presented at last month's CSCW Conference observes that "Mass collaboration systems are often characterized as unstructured organizations lacking rule and order", yet Wikipedia has a well developed body of policies to support it as an organization.

Wikipedia not so novel after all, except to UK university lecturers: "Wikipedia and Encyclopedic Production" by Jeff Loveland (a historian of encyclopedias) and Joseph Reagle situates Wikipedia within the context of encyclopedic production historically, arguing that the features that many claim to be unique about Wikipedia actually have roots in encyclopedias of the past.

A special issue of the American Behavioral Scientist is devoted to "open collaboration".

The gathering of hundreds of Wikipedians to cover the Sandy Hook Elementary School shooting in its immediate aftermath, and a look back at Wikipedians' participation in the January protests against SOPA and PIPA.

An open-access preprint presents the results from a study attempting to predict early box office revenues from Wikipedia traffic and activity data. The authors – a team of computational social scientists from Budapest University of Technology and Economics, Aalto University and the Central European University – submit that behavioral patterns on Wikipedia can be used for accurate forecasting, matching and in some cases outperforming the use of social media data for predictive modeling. The results, based on a corpus of 312 English Wikipedia articles on movies released in 2010, indicate that the joint editing activity and traffic measures on Wikipedia are strong predictors of box office revenue for highly successful movies.

A paper in the Journal of the American Society for Information Science and Technology, coming from the social control perspective and employing the repertory grid technique, has contributed interesting observations about the governance of Wikipedia.

From the modeling of social dynamics in a collaborative environment to why the number of Wikipedia readers rises while the number of editors doesn't.