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Voting by Mail and Turnout in Oregon

In the most widely cited result on the turnout effects of voting by mail, Southwell and Burchett report that Oregon’s system increased turnout by 10 percentage points. We attempt to replicate this finding and extend the analysis to additional years to test whether the originally reported effect is due to the novelty of the first three voting by mail elections in 1995 and 1996. We are unable to reproduce earlier findings, either via replication or extending the time series to include 2010 electoral data. We find evidence for a novelty effect when all elections between 1960 and 2010 are included in our analysis, and a consistent impact of voting by mail on turnout only in special elections.