The 2013 American Values Survey was conducted by Public Religion Research Institute. The survey was conducted among a random sample of 2,317 adults (age 18 and up) living in the United States and who are part of GfK’s Knowledge Panel. The sample was weighted on ten different parameters—sex, age, race and ethnicity, education level, geographic region, household income, metropolitan area, Internet access, home ownership status, and employment status. Author(s) : Public Religion Research Institute