Kevin Volpp (PSC/PARC Research Associate) was quoted in Politifact article about the success of lotteries to incentivize vaccination uptake. Academic studies of early vaccine lotteries do provide reason for skepticism about how successful such programs have been. However, the studies so far have produced mixed findings, rather than unanimously negative ones. Two studies of Ohio’s lottery found a positive impact while two found no impact or a negative impact. Experts say that even in the most optimistic case, any gains from lotteries are likely to be small and would need to be supplemented by other efforts.