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Monetary incentives increase COVID-19 vaccinations.

Pol Campos-Mercade1, Armando N Meier2,3, Florian H Schneider4

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Modest monetary incentives, like a 24 US dollar payment, significantly boosted COVID-19 vaccination rates in Sweden. Behavioral nudges had minimal impact on actual vaccination uptake.

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Area of Science:

  • Public Health
  • Behavioral Economics
  • Health Policy

Background:

  • Declining COVID-19 vaccination rates pose a significant public health risk globally.
  • Monetary incentives are being explored as a strategy to enhance vaccine uptake.
  • Understanding the effectiveness of different incentive types is crucial for public health interventions.

Purpose of the Study:

  • To evaluate the impact of guaranteed monetary payments on COVID-19 vaccination rates.
  • To compare the effectiveness of monetary incentives versus behavioral nudges in increasing vaccination uptake.

Main Methods:

  • A large-scale, preregistered randomized controlled trial involving 8286 participants in Sweden.
  • Linking trial data with population-wide administrative vaccination records for accurate outcome measurement.
  • Assessing the effect of a 24 US dollar (200 Swedish kronor) payment and behavioral nudges on vaccination rates.

Main Results:

  • Modest monetary payments increased vaccination rates by 4.2 percentage points (P = 0.005) from a baseline of 71.6%.
  • Behavioral nudges showed a small, statistically insignificant impact on actual vaccination rates, despite increasing stated intentions.
  • Monetary incentives proved more effective than behavioral nudges in driving vaccination behavior.

Conclusions:

  • Guaranteed monetary incentives are an effective tool for increasing COVID-19 vaccination rates.
  • The findings suggest that financial incentives can overcome barriers to vaccination more effectively than behavioral interventions alone.
  • Policy implications highlight the potential of modest financial incentives for boosting public health vaccination campaigns.