All-Mail Voting in Colorado Increases Turnout and Reduces Turnout Inequality

The COVID-19 crisis has sparked interest in all-mail voting as a potential policy solution for avoiding in-person elections. However, past research into the effect of all-mail voting on voter turnout has found mixed results. We exploit the implementation of all-mail voting in Colorado, where statewide policy implementation was effective but turnout has been understudied, to estimate the effect of all-mail voting on turnout for all registered voters, along with age, racial, education, income, and occupational subgroups. Using large voter file data and a difference-in-differences design within individuals, we find an overall turnout effect of approximately 9.4 percentage points. Turnout effects are significantly larger among lower-propensity voting groups, such as young people, blue-collar workers, voters with less educational attainment, and voters of color. The results suggest that researchers and policymakers should look to Colorado’s all-mail voting approach as an effective model for boosting aggregate turnout and reducing disparities across subgroups.

Electorate Study: How Did the Voter’s Choice Act Affect Turnout in 2018?

Research Questions: “In its first year of implementation, did the Voter’s Choice Act (VCA) change turnout patterns in the counties – Madera, Napa, Nevada, Sacramento, and San Mateo – that adopted this new reform? How did this reform affect the turnout of groups of Californians – young voters, Latinos, and Asian Americans– who have often participated in elections at lower rates than others? We address these questions by gathering data on turnout rates, voter demographics, and electoral competition from 2002 through the primary and general elections of 2018, comparing trends in the adopting counties to the rest of the state.”

How Electoral Institutions Affect Political Accountability

This research finds that expansion of vote at home systems increases turnout and reduces ballot roll-off.

Abstract: “A central question in the study of democratic governance concerns the conditions under which voters make informed choices at the ballot box. I exploit the staggered implementation of an electoral reform in a U.S. state to study the effects of electoral institutions on voter information and political accountability. I find that [vote at home] elections cause an increase in turnout in municipal elections and a decrease in ballot roll-off on statewide ballot measures in presidential election years in some counties, which is largely consistent with my argument that voters gather more information about politics when voting by mail. Further, there is strong evidence that vote-by-mail results in a decrease in taxing and spending in municipalities. The institution has less conclusive effects on municipal accountability audit outcomes. Using data from the Catalist voter file I show that these results cannot be explained by changes in the composition of the electorate caused by vote-by-mail.”

Evidence for the Positive Turnout Effects of Mail Voting in Participating Utah Counties

In the 2016 general election, 21 counties in Utah administered voting entirely by mail, while eight counties administered traditional polling place-based voting. Using vote propensity scores to control for voters’ pre-existing differences in likelihood to vote, we show that the advent of vote-by-mail increased turnout by 5-7 points. Low-propensity voters, including young voters, showed the greatest increase in turnout in vote-by-mail counties relative to their counterparts in non-vote-by-mail counties. We find similar results by zooming in on specific geographic areas within Utah where vote-by-mail counties are bordered by non-vote-by-mail counties, with magnitudes of 4-9 points of increased turnout. In one mountaintop community that happened to be bisected by a county line, the increase in turnout due to vote-by-mail may have been as high as 12.5 points.