If you ask, they will come (to register and vote): Field experiments with state election agencies on encouraging voter registration

We address the frequent critique that voter registration is a barrier to participation in the US. Institutional reforms to voter registration produce only small impacts on participation. We show the registration barrier can be reduced without changing laws or administrative processes using official communication seeking to change individual political behavior. In collaboration with state election agencies in two states, we conducted large-scale field experiments using low cost postcards aimed at increasing registration among eligible but unregistered citizens. The experiments find statistically and substantively significant effects on registration and turnout in subsequent elections. The research partnership with election officials is unusual and important for understanding electoral participation. Further, the population targeted for registration is broader than prior experiments on voter registration in the US. The results provide important insights about voter registration as a barrier to political participation, plus practical guidance for election officials to reduce this barrier. •Direct mail from election officials can increase voter registration among eligible but unregistered citizens.•Individuals encouraged to register by election officials turnout at higher rates than those not contacted.•No significant differences in turnout or registration between groups treated with a variety of mechanisms.