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Roper iPoll includes polling data from nearly every major organization that has conducted polls in the United States today, including academic, media, foundation, nonprofit and private industry pollsters. The archive also includes data from polling organizations based in over 120 countries. iPoll consists of over 35,000 studies with over 725,000 searchable survey questions, and over 24,000 datasets from public opinion surveys dating back to the 1930s. These studies cover a vast variety of topics including elections and politics, social issues, finances and the economy, education, health, international affairs, social movements and change, and historical events. Also includes downloadable questionnaires, analysis, interviewer instructions, and cross-tab analytic tools.
Pew Research Center is a nonpartisan fact tank that informs the public about the issues, attitudes and trends shaping America and the world. It conducts public opinion polling, demographic research, media content analysis and other empirical social science research.