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When does increasing mobilization effort increase turnout? Recent experiments find second calls containing a reminder to vote increase turnout beyond an initial contact. We argue existing studies cannot explain why reminder calls are effective because they test bundled treatments including a late mobilization attempt, a late mobilization attempt given earlier contact, and potentially activating reciprocity established in earlier contact. We report results from a two-round voter mobilization field experiment that allows us to isolate these different mechanisms. We find that reminder calls increase turnout by 1.2% points among subjects contacted in an earlier attempt, but that enhancing reciprocity by providing a reminder call offer during an early call does not increase turnout beyond a second call. Additionally, we fail to find heterogeneous effects of reminder calls by stated preference for a reminder or by stated vote intention, suggesting certain mechanisms do not explain the effects of reminder calls. [ABSTRACT FROM AUTHOR]

Are mobilization appeals that include information about descriptive voting norms more effective at increasing turnout when the descriptive norm is framed positively (by highlighting a referent’s desirable behavior and encouraging consistent behavior) instead of negatively (by highlighting a referent’s lack of desirable behavior as problematic but also encouraging that behavior)? Few published studies have experimentally assessed this question and yield mixed results. We address the need for additional replication by designing and analyzing data from two field experiments conducted across four states in the 2014 primary and general elections. We find no differential effects on turnout of framing descriptive voting norms positively or negatively. The results are not sensitive to election context, the mode of treatment delivery, or whether the descriptive norm appeals involve a group or self-referent. Additional research is needed to understand the conditions under which positive versus negative descriptive norm framing has distinguishable effects on turnout. [ABSTRACT FROM AUTHOR]