Along with co-authors, BKC Affiliate Nathaniel Lubin analyzes an archive of 146 advertising experiments conducted by US campaigns in 2018 and 2020.
The study's "findings indicate that experiments can compound money’s influence in elections: it is difficult to predict ex ante which ads persuade, experiments help campaigns do so, but the gains from these findings principally accrue to campaigns well-financed enough to deploy these ads at scale."
Read more in American Political Science Review.