Programming the rules of engagement: social media design and the nonprofit system / Rena Bivens -- Digital opportunity structures: explaining variation in digital mobilization during the 2016 democratic primaries / Daniel Kreiss -- Kids these days: supply and demand for youth online political engagement / Thomas Elliott and Jennifer Earl -- Why Dewey was wrong / Beth Simone Noveck -- Counting the uncounted: what the absence of data on police killings reveals / Kelly Gates -- Digital peripheries and the politics of expertise in Nairobi, Kenya / Lisa Poggiali -- Authoritarian deliberation 2.0: lurking and discussing politics in Chinese social media / Daniela Stockmann and Ting Luo -- How the market for social media shapes strategies of internet censorship / Jennifer Pan -- Measure of a movement: quantifying Black Lives Matter's social media power / Deen Freelon -- Must privacy give way to use regulation? / Helen Nissenbaum -- Democratic futures and the Internet of Things: how information infrastructure will become a political constitution / Philip N. Howard