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This article examines the use of Twitter at protests surrounding the G20 meetings held in Pittsburgh, PA in September 2009. Based on work on information communication technologies and protest, and on more recent work on Twitter usage at protests, we develop several hypotheses about the content of tweets during protests. Most significantly, we argue that Twitter is a widely available mobile social networking tool that can be used to reduce information asymmetries between protesters and police. Examining the content of 30,296 tweets over a nine-day period, we find that protesters frequently used Twitter to share information, including information about protest locations, as well as the location and actions of police, which is information that was formerly monopolized by the police. Twitter use may be creating a new dynamic in protester and police interaction toward information symmetries. We conclude by identifying implications for policing practices and for protesters.
Earl et al. (Thu,) studied this question.