Abstract
This study examines voter turnout in the American states in U.S. presidential and House elections from 1920 through 2008. A model predicts turnout as the sum of the national campaign context, state autonomy, and electoral continuity. The national campaign context encompasses conditions that prompt turnout to shift similarly across states. State autonomy involves state-specific factors that prompt turnout to vary across states. Electoral continuity involves people voting in successive elections, regardless of other influences. Testing the model finds that national campaign context effects have increased, but they vary by year, election type, and region and have been mixed since the 1970s.
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