U.S. Congress members' social circles are more important in how they vote than their liberal or conservative beliefs or constituents' opinions, according to a new model of voting behavior created by Dartmouth College researchers.
The study appears in the journal Research & Politics. A PDF is available on request.
The standard model of voting behavior basically assumes there is only one factor that matters: where a legislator lives on the liberal-conservative axis. That position, derived from their roll call votes, serves as an ideological marker that presumably summarizes the various forces that can influence the legislators' votes, including personal preferences, party preferences and constituent opinion.