This chapter uses new data and more up-to-date statistical models to reevaluate the effects of closing date and Election Day registration (EDR) on voter turnout. It discusses alternative modeling strategies of registration deadlines and takes a fresh look at the impact of closing dates and EDR during the period 1980–2006. In particular, the chapter explores the consequences of changing the analytic focus from cross-sectional comparisons of different states at a given point in time to cross-temporal comparisons of each state over time. In comparison to earlier studies, this chapter suggests that closing dates and Election Day registration have limited effects on turnout.