Boll Weevils and Roll-Call Voting: A Study in Time and Space
Legislative Studies Quarterly XXIII:245-69

Using a pooled time-series analysis of southern congressional districts from 1983 to 1992, we evaluate theories associating constituency and institutional factors with recent shifts in the voting patterns of southern Democrats. While we find that Democrats serving areas with larger minority populations and more progressive white populations tend to be more liberal, the greatest portion of the aggregate liberalization of voting patterns is attributable to cohort change. Voting records of southern Democrats elected prior to 1982 remained relatively constant, and we find no evidence of any general trend in the recent voting patterns of southern Democrats when controlling for other factors.

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