Experimental Evidence on the Effectiveness of Nonexperts for Improving Vaccine Demand
通过实验改变信息发送者和信号类型，发现非专家（与目标人群背景相似的普通人）比专家更能有效提升美国低学历黑人和白人的疫苗接种意愿，尤其在原本最不愿接种的人群中效果显著。
We experimentally vary signals and senders to identify which combination will increase vaccine demand among a disadvantaged population in the United States-Black and White men without a college education. Our main finding is that laypeople (nonexpert concordant senders) are most effective at promoting vaccination, particularly among those least willing to become vaccinated. This finding points to a trade-off between the higher qualifications of experts on the one hand and the lower social proximity to low-socioeconomic-status populations on the other hand, which may undermine credibility in settings of low trust.