标题： 利用唐纳德·特朗普对新冠疫苗的推荐为公共卫生注入一剂强心针：一项大规模广告实验 显示英文标题

标题： Using Donald Trump's COVID-19 Vaccine Endorsement to Give Public Health a Shot in the Arm: A Large-Scale Ad Experiment

摘要： 我们报告了一项大规模的随机对照试验，旨在评估来自唐纳德·特朗普的疫苗支持信息的党派提示是否能促使美国人接种新冠疫苗。 我们的研究涉及在2021年10月向数百万美国YouTube用户展示一段27秒的广告。 结果显示，该活动使每个接受治疗的县平均增加了103剂疫苗。 分布在1014个接受治疗的县中，该活动的总体效果估计增加了104,036剂疫苗。 该活动具有成本效益：总预算约为10万美元，获得额外一剂疫苗的成本约为1美元或更少。 显示英文摘要

摘要： We report a large-scale randomized controlled trial designed to assess whether the partisan cue of a pro-vaccine message from Donald Trump would induce Americans to get COVID-19 vaccines. Our study involved presenting a 27-second advertisement to millions of U.S. YouTube users in October 2021. Results indicate that the campaign increased the number of vaccines in the average treated county by 103. Spread across 1,014 treated counties, the total effect of the campaign was an estimated increase of 104,036 vaccines. The campaign was cost-effective: with an overall budget of about \$100,000, the cost to obtain an additional vaccine was about \$1 or less.