Resources

This United States Postal Service (USPS) report outlines the scope of election mail handled by USPS and identifies key service challenges including poorly designed ballot envelopes, tight state deadlines that don't align with postal delivery windows, and inconsistent postmarking requirements. The report identifies the "extraordinary measures" taken by USPS during election periods to effectively process and deliver election mail.

Even before the 2020 election, this reseach finds that voter turnout across the states is consistently higher in every general election over the past decade in states with greater shares of overall ballots cast by mail. Drawing on turnout data from the 2012-2020 Current Population Survey (CPS) and the Cooperative Election Study (CES), authors find states with greater usage of mail voting experience higher overall voter turnout.

The research finds no evidence that voting by mail increases the risk of voter fraud overall. Between 2016 and 2019, RBM (VBM) states reported similar fraud rates to non-RBM (non-VBM) states. Moreover, it is estimated Washington would have reported 73 more cases of fraud between 2011 and 2019 had it not introduced its VBM law.

This paper provides a history of military voting by absentee ballot.

The guide provides a basic framework for testing risk limiting audits in diverse contexts by outlining foundational prerequisites and operational, legal and regulatory considerations

Philadelphia officials randomly sent 46,960 Philadelphia registrants postcards encouraging them to apply to vote by mail in the lead-up to the June 2020 primary election. While the intervention increased the likelihood a registrant cast a mail ballot by 0.4 percentage points —or 3%—many of these additional mail ballots counted only because a last-minute policy intervention allowed most mail ballots postmarked by Election Day to count.

This analysis shows that the implementation of vote by mail causes a significant decrease in voter confidence in Washington and Colorado. However, this decrease appears to be temporary, disappearing after only a single election cycle.

Focusing on natural experiments in Texas and Indiana, this research finds that 65-year-olds turned out at nearly the same rate as 64-year-olds, despite the fact that only 65-year-olds could vote absentee without an excuse in these states. Being just old enough to vote no-excuse absentee did not substantially increase Democratic turnout relative to Republican turnout.

This paper shows how reporting data at the ballot-card level can reduce risk limiting audits sample sizes and improve audit efficiency.

This research finds that expanding universal vote-by-mail has not dramatically advantaged either party historically.

This study of California focuses on (1) vote-by-mail signature verification processes and (2) notice and remedy procedures for unverified signatures.

This research tests four explanations for how vote by mail voters choose to return their ballot, including the social rewards of voting, the costs of voting, trust in U.S. Postal Service and a preference to cast a ballot after campaigning ends. It finds supporting evidence for each explanation conditioned by prior history of voting.