Why have some states adopted policies expanding ballot access while others have restricted access to the ballot? Since the 1990s, some states have been adopting policies restricting access to the ballot such as requiring identification. At the same time, states have been adopting a variety of registration reforms that lower the barriers to registration and voting. Using an original, 45-state dataset, we examine state innovation within the policy domain of electoral reforms in US states. We find reforms have an independent and, sometimes, negative effect on the innovation of states in electoral reforms. Next, we use dyad analysis to examine the spread of a single policy: automatic voter registration. We find that the propensity to innovate both within and across a state makes the spread of automatic voter registration more likely. Our paper contributes to the broader understanding of why states adopt electoral reforms.
