2010 study by Perspectives on Politics on Internet usage and patterns of participatory inequality in American politics.
2011 study in American Political Science Review on the societal conditions that spur anti-immigrant sentiment.
2009 study by the University of Missouri in Political Behavior on the origins of the male-female divide in knowledge of politics.
2010 study in American Journal of Political Science on barriers to further growth as female legislative ranks increase.
Pew Research Center report surveying online participation during election season.
2011 Wellesley College study looking at whether Google Trends volume was predictive of 2008 and 2010 U.S. Congressional elections.
2010 study in American Journal of Political Science on the persistent political gender gap in American politics.
2011 study by researchers from Bucknell and UNC Chapel Hill on the varied political views of those who self-identify as "conservative."
2006 Princeton University study on the relationship between growing income inequality and increasing political divisions in the United States.
2009 study by the Pew Center of the States on expenses incurred at the state and county levels in Oregon during the 2008 election.