Remarks
A list of Roper Members is available at https://ropercenter.cornell.edu/membership/list-members
The iPOLL Databank: Comprehensive resource for US public opinion; The system allows for users to sift through over 700,000 questions archived from national public opinion surveys since 1935.
There is no connection today between the non-profit Roper Center for Public Opinion Research at Cornell University and the for-profit Roper Poll owned by GfK Group. Public opinion pioneer Elmo Roper founded both organizations, but they are completely separate entities.