2010 study by MIT in PNAS on social networks and the spread of health-related behaviors.
2011 study from Northwestern University on different motivations among teens who use Twitter.
2011 report from the Pew Research Center on social media dynamics around the 2012 presidential nominating contest in the United States.
2009 paper by the University of Illinois at Urbana-Champaign attempted to predict the strength of real-world relationships based on social media interactions.
2011 study by the Dubai School of Government on social networking access and usage during the region's 2011 democracy movements.
2011 study by the Pew Research Center on levels of trust, tolerance and engagement among social networking users.
Pew Research Center report surveying online participation during election season.
2010 study for the Association for the Advancement of Artificial Intelligence on how social media users wield influence.