Following Green & Gerber,this section is not rated by level of confidence. These statements are unrated impressions from a growing body of research.
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Various methods: Innovation/under-tested fund results webinar

Several organizations collaborated to provide funds for 10 unique projects, which were presented on 12/7/21. These slide decks from those presentations provide the main ideas and findings, though details of methods would need to be sought from the individual study directors for more thorough understanding.  The interventions ranged from established influencers to roadside signs delivering GOTV messages. (OpenLabs, America Votes, & Movement Cooperative, 2021) [Labandibar, S. 4/2/22] (Newby, R)