Association between statewide financial incentive programs and COVID-19 vaccination rates.

To promote COVID-19 vaccination, many states in the US introduced financial incentives ranging from small, guaranteed rewards to lotteries that give vaccinated individuals a chance to win large prizes. There is limited evidence on the effectiveness of these programs and conflicting evidence from sur...

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Main Authors: Harsha Thirumurthy, Katherine L Milkman, Kevin G Volpp, Alison M Buttenheim, Devin G Pope
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2022-01-01
Series:PLoS ONE
Online Access:https://doi.org/10.1371/journal.pone.0263425
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author Harsha Thirumurthy
Katherine L Milkman
Kevin G Volpp
Alison M Buttenheim
Devin G Pope
author_facet Harsha Thirumurthy
Katherine L Milkman
Kevin G Volpp
Alison M Buttenheim
Devin G Pope
author_sort Harsha Thirumurthy
collection DOAJ
description To promote COVID-19 vaccination, many states in the US introduced financial incentives ranging from small, guaranteed rewards to lotteries that give vaccinated individuals a chance to win large prizes. There is limited evidence on the effectiveness of these programs and conflicting evidence from survey experiments and studies of individual states' lotteries. To assess the effectiveness of COVID-19 vaccination incentive programs, we combined information on statewide incentive programs in the US with data on daily vaccine doses administered in each state. Leveraging variation across states in the daily availability of incentives, our difference-in-differences analyses showed that statewide programs were not associated with a significant change in vaccination rates. Furthermore, there was no significant difference in vaccination trends between states with and without incentives in any of the 14 days before or after incentives were introduced. Heterogeneity analyses indicated that neither lotteries nor guaranteed rewards were associated with significant change in vaccination rates.
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spelling doaj.art-1ae30e11df7a4f1e82d3e1882ddb87182022-12-22T02:23:35ZengPublic Library of Science (PLoS)PLoS ONE1932-62032022-01-01173e026342510.1371/journal.pone.0263425Association between statewide financial incentive programs and COVID-19 vaccination rates.Harsha ThirumurthyKatherine L MilkmanKevin G VolppAlison M ButtenheimDevin G PopeTo promote COVID-19 vaccination, many states in the US introduced financial incentives ranging from small, guaranteed rewards to lotteries that give vaccinated individuals a chance to win large prizes. There is limited evidence on the effectiveness of these programs and conflicting evidence from survey experiments and studies of individual states' lotteries. To assess the effectiveness of COVID-19 vaccination incentive programs, we combined information on statewide incentive programs in the US with data on daily vaccine doses administered in each state. Leveraging variation across states in the daily availability of incentives, our difference-in-differences analyses showed that statewide programs were not associated with a significant change in vaccination rates. Furthermore, there was no significant difference in vaccination trends between states with and without incentives in any of the 14 days before or after incentives were introduced. Heterogeneity analyses indicated that neither lotteries nor guaranteed rewards were associated with significant change in vaccination rates.https://doi.org/10.1371/journal.pone.0263425
spellingShingle Harsha Thirumurthy
Katherine L Milkman
Kevin G Volpp
Alison M Buttenheim
Devin G Pope
Association between statewide financial incentive programs and COVID-19 vaccination rates.
PLoS ONE
title Association between statewide financial incentive programs and COVID-19 vaccination rates.
title_full Association between statewide financial incentive programs and COVID-19 vaccination rates.
title_fullStr Association between statewide financial incentive programs and COVID-19 vaccination rates.
title_full_unstemmed Association between statewide financial incentive programs and COVID-19 vaccination rates.
title_short Association between statewide financial incentive programs and COVID-19 vaccination rates.
title_sort association between statewide financial incentive programs and covid 19 vaccination rates
url https://doi.org/10.1371/journal.pone.0263425
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