Berinsky, Adam J., Huber, Gregory A., and Lenz, Gabriel S.. 2012. “Evaluating Online Labor Markets for Experimental Research: Amazon.com’s Mechanical Turk.” Political Analysis 20 (3): 351–68.
Biggers, Daniel R. 2014. Morality at the Ballot: Direct Democracy and Political Engagement in the United States. New York: Cambridge University Press.
Bowler, Shaun, and Donovan, Todd. 2002. “Democracy, Institutions and Attitudes about Citizen Influence on Government.” British Journal of Political Science 32 (2): 371–90.
Budge, Ian. 2006. “Direct Democracy.” In The Oxford Handbook of Political Institutions, ed. Rhodes, R. A. W., Binder, Sarah A., and Rockman, Bert A., 596–610. New York: Oxford University Press.
Buhrmester, Michael, Kwang, Tracy, and Gosling, Samuel D.. 2011. “Amazon’s Mechanical Turk: A New Source of Inexpensive, Yet High-Quality, Data?” Perspectives on Psychological Science 6 (1): 3–5.
Damore, David F., and Nicholson, Stephen P.. 2014. “Mobilizing Interests: Group Participation and Competition in Direct-Democracy Elections.” Political Behavior 36 (2): 535–52.
Dyck, Joshua, and Seabrook, Nicholas. 2010. “Mobilized by Direct Democracy: Short-Term Versus Long-Term Effects and the Geography of Turnout in Ballot-Measure Elections.” Social Science Quarterly 91 (1): 188–208.
Hibbing, John, and Theiss-Morse, Elizabeth. 2002. Stealth Democracy: Americans’ Beliefs about How Government Should Work. Cambridge: Cambridge University Press.
Huff, Connor, and Tingley, Dustin. 2015. “‘Who Are These People?’ Evaluating the Demographic Characteristics and Political Preferences of MTurk Survey Respondents.” Research & Politics July–September: 1–12.
Hutchings, Vincent L., Walton, Hanes, and Benjamin, Andrea. 2010. “The Impact of Explicit Racial Cues on Gender Differences in Support for Confederate Symbols and Partisanship.” Journal of Politics 72 (4): 1175–88.
Kostelka, Filip, and Blais, Andre. 2018. “The Chicken and Egg Question: Satisfaction with Democracy and Voter Turnout.” PS: Political Science & Politics 51 (2): 370–76.
Levay, Kevin E., Freese, Jeremy, and Druckman, James N.. 2016. “The Demographic and Political Composition of Mechanical Turk Samples.” SAGE Open January–March: 1–17.
Magleby, David B. 1984. Direct Legislation: Voting on Ballot Propositions in the United States. Baltimore, MD: Johns Hopkins University Press.
Magleby, David B. 1994. “Let the Voters Decide? An Assessment of the Initiative and Referendum Process.” University of Colorado Law Review 66 (1): 13–46.
Mullinix, Kevin J., Leeper, Thomas J., Druckman, James N., and Freese, Jeremy. 2015. “The Generalizability of Survey Experiments.” Journal of Experimental Political Science 2 (2): 109–38.
Schwartzberg, Melissa. 2013. Counting the Many: The Origins and Limits of Supermajority Rule. New York: Cambridge University Press.
Smith, Daniel A., and Tolbert, Caroline J.. 2004. Educated by Initiative: The Effects of Direct Democracy on Citizens and Political Organizations. Ann Arbor: University of Michigan Press.
Tolbert, Caroline, McNeal, Ramona, and Smith, Daniel. 2003. “Enhancing Civic Engagement: The Effect of Direct Democracy on Political Participation and Knowledge.” State Politics and Policy Quarterly 3 (1): 23–41.
Tolbert, Caroline, and Smith, Daniel. 2005. “The Educative Effects of Ballot Initiatives on Voter Turnout.” American Politics Research 33 (2): 283–309.
Waters, M. Diane. 2002. “Initiative and Referendum for Alabama: Empower the People.” Auburn, AL: Initiative & Referendum Institute.