Glott, Ruediger; Schmidt, Philipp; Ghosh, Rishab; "Wikipedia Survey – Overview of Results", United Nations University, March 2010 (12.64% of respondents were female).
Judd Antin, Raymond Yee, Coye Cheshire, Oded Nov, "Gender Differences in Wikipedia Editing", WikiSym’11, October 3-5, 2011, study funded by Research Fund at UC Berkeley. Perhaps the most significant finding is that male editors tend to make an edit followed by revisions to that edit, whereas women tend to make single, larger edits and less revisions.
H. T. Welser, D. Cosley, G. Kossinets, A. Lin, F. Dokshin, G. Gay, and M. Smith, Finding social roles in Wikipedia, Proceedings of the 2011 iConference, page 122-129, 2011. (Provides interesting context.)
Lam, S.; Uduwage, A.; Dong, Z.; Sen, S.; Musicant, D.; Terveen, L.; Reidl, J. (tetor 2011). "WP:Clubhouse? An Exploration of Wikipedia's Gender Imbalance"(PDF). WikiSym '11. ACM. Quote: "culture that may be resistant to female participation."{{cite journal}}: Mungon ose është bosh parametri |language= (Ndihmë!) (Notes that contributions of users who identified as women are significantly more likely to be challenged or undone by fellow editors, according to a 2011 report by the University of Minnesota.)
Collier, B., & Bear, J. (2012). “Conflict, criticism, or confidence”. In Proceedings of the ACM 2012 conference on Computer Supported Cooperative Work- CSCW ’12 (p. 383). New York, New York, USA: ACM Press. DOI
Steiner, Linda; Eckert, Stine, Wikipedia's Gender Gap, International Communication Association conference paper, 2012.
Sook Lim; Nahyun Kwon (2010). "Gender differences in information behavior concerning Wikipedia, an unorthodox information source?". Library and Information Science Research. 32 (3): 212–220. {{cite journal}}: Mungon ose është bosh parametri |language= (Ndihmë!)Mirëmbajtja CS1: Emra të shumëfishtë: lista e autorëve (lidhja)DOI
Collier, B., & Bear, J. (2012). Conflict, criticism, or confidence. Proceedings of the ACM 2012 conference on Computer Supported Cooperative Work - CSCW ’12 (p. 383). New York, New York, USA: ACM Press. PDF • DOI
"Gender gap coverage in media and blogs" section of a December 5, 2013 Wikimedia blog entry summarizes article. In short: based on a qualitative analysis of 42 articles from US news media and blogs, and 1,336 comments from online readers authors see a “broader backlash against women, and particularly feminism” in the U.S. news media and blogs. They question whether the Wikimedia Foundation is properly addressing the issue.
Daniela Iosub, et al, "Emotions under Discussion: Gender, Status and Communication in Online Collaboration", PLOS ONE, 20 August 2014 Quote: "A persistent gender difference is that female contributors communicate in a manner that promotes social affiliation and emotional connection more than male editors, irrespective of their status in the community. Female regular editors are the most relationship-oriented, whereas male administrators are the least relationship-focused. Finally, emotional and linguistic homophily is prevalent: editors tend to interact with other editors having similar emotional styles."
Julia Adams, Hannah Brueckner, “Wikipedia and the Democratization of Academic Knowledge”, a two-year National Science Foundation grant for exploring gender-specific patterns of representation of scholars and scholarship. One of the project’s goals is to contribute to improving quality and reducing bias on academic – and more general – Wikipedia."