Hello all, the Journal for Computer Supported Cooperative Work has a special issue on the impact of social media and big data on citizenship. It appears evident that the emergence of social media platforms and data practices challenges our traditional understanding of citizenship. This special issue investigates telling examples of this process and aims at mapping the various actors of change. Exploratively, the papers describe how social media and data repositories provide possibilities or challenges for civic action, investigate their potential for expanding the media sphere from corporate news coverage to commentary and debate in the blogosphere or address issues that arise through the intensified possibilities of data analysis. "Challenging Citizenship: Social Media and Big Data" http://link.springer.com/journal/10606/25/2/page/1 Editorial Notes "Challenging Citizenship: Social Media and Big Data" Mirko Tobias Schäfer <http://link.springer.com/article/10.1007/s10606-016-9255-8> Paper: "Genomic Big Data and Privacy: Challenges and Opportunities for Precision Medicine" Julie Frizzo-Barker, Peter A. Chow-White, Anita Charters, Dung Ha <http://link.springer.com/article/10.1007/s10606-016-9248-7> Paper: "Smart Citizens: Exploring the Tools of the Urban Bottom-Up Movement" Sabine Niederer, Ruurd Priester <http://link.springer.com/article/10.1007/s10606-016-9249-6> Paper: "Open Data, Crowdsourcing and Game Mechanics. A case study on civic participation in the digital age" Reinhard A. Handler, Raul Ferrer Conill <http://link.springer.com/article/10.1007/s10606-016-9250-0> Paper: "Bloggers’ Responses to the Snowden Affair: Combining Automated and Manual Methods in the Analysis of News Blogging" Dag Elgesem, Ingo Feinerer, Lubos Steskal <http://link.springer.com/article/10.1007/s10606-016-9251-z> Paper: "From Publics to Communities: Researching the Path of Shared Issues Through ICT" Thomas Ludwig, Christian Reuter, Volkmar Pipek <http://link.springer.com/article/10.1007/s10606-016-9252-y> ---all articles are also available at Sci-Hub---- Cheers, mirko Mirko Tobias Schäfer | Assistant Professor for New Media & Digital Culture | Principal Investigator at Utrecht Data School| Utrecht University | MCW | Muntstraat 2a | 3512 EV Utrecht | T: +31-644620751 | M: m.t.schaefer@uu.nl | W: www.mtschaefer.net | www.dataschool.nl