The American National Election Studies (www.electionstudies.org). THE 1948-2004 ANES CUMULATIVE DATA FILE [dataset]. Stanford University and the University of Michigan [producers and distributors], 2005.

These materials are based on work supported by the National Science Foundation under Grant Nos. : SBR-9707741, SBR-9317631, SES-9209410, SES-9009379, SES-8808361, SES-8341310, SES-8207580, and SOC77-08885.

Any opinions, findings and conclusions or recommendations expressed in these materials are those of the author(s) and do not necessarily reflect the views of the funding organizations.