USA
National
Opinion Research Center (NORC), University of Chicago
NORC conducts the General Social Survey (GSS)
Docking
Institute of Public Affairs, Fort Hays State University
Indiana
University Center for Survey Research
Survey
Research Center, Princeton University
Survey
Research Center, Institute for Social Research, The University
of Michigan
Survey
Research Center, UC Berkeley
Survey
Research Center, University of Maryland
The
University of Wisconsin Survey Center
Europe
The
Danish National Institute of Social Research
The
International Institute of Social Studies, The Hague, The
Netherlands
Central Archive
for Empirical Social Research, University of Cologne
Europinion
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