HKS Authors

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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.


Alsan, Marcella, and Sarah Eichmeyer. "Experimental Evidence on the Effectiveness of Nonexperts for Improving Vaccine Demand." American Economic Journal: Economic Policy 16.1 (February 2024): 394-414.