Editor's note: This write-up was originally published in March 2018 and has actually been up to date for comprehensiveness. 17Fong and Grimmer recommend working with as several as 100 vignettes (or maybe more) for each treatment method. This was infeasible for our research, so though we acknowledge the value of https://agency-social.com/story2989470/campaign-ad-no-further-a-mystery