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Nudges for COVID-19 voluntary vaccination: How to explain peer information?

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  • Sasaki, Shusaku
  • Saito, Tomoya
  • Ohtake, Fumio

Abstract

Vaccination promotion is a crucial strategy to end the COVID-19 pandemic; however, individual autonomy should also be respected. This study aimed to discover other-regarding information nudges that can reinforce people's intention to receive the COVID-19 vaccine without impeding their autonomous decision-making. In March 2021, we conducted an online experiment with 1595 people living throughout Japan, and randomly assigned them either of one control group and three treatment groups that received messages differently describing peer information: control, comparison, influence-gain, and influence-loss. We compared each message's effects on vaccination intention, autonomous decision-making, and emotional response. We found that the influence-gain nudge was effective in increasing the number of older adults who newly decided to receive the vaccine. The comparison and influence-loss nudges further reinforced the intention of older adults who had already planned to receive it. However, the influence-loss nudge, which conveys similar information to the influence-gain nudge but with loss-framing, increased viewers' negative emotion. These messages had no promoting effect for young adults with lower vaccination intentions at baseline. Based on the findings, we propose governments should use different messages depending on their purposes and targets, such as comparison instead of influence-loss, to encourage voluntary vaccination behavior.

Suggested Citation

  • Sasaki, Shusaku & Saito, Tomoya & Ohtake, Fumio, 2022. "Nudges for COVID-19 voluntary vaccination: How to explain peer information?," Social Science & Medicine, Elsevier, vol. 292(C).
    • Handle: RePEc:eee:socmed:v:292:y:2022:i:c:s0277953621008935
    DOI: 10.1016/j.socscimed.2021.114561
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    1. Shin KINOSHITA & Masayuki SATO & Takanori IDA, 2022. "Bayesian Probability Revision and Infection Prevention Behavior in Japan : A Quantitative Analysis of the First Wave of COVID-19," Discussion papers e-22-004, Graduate School of Economics , Kyoto University.
    2. Bonander, Carl & Ekman, Mats & Jakobsson, Niklas, 2022. "Vaccination nudges: A study of pre-booked COVID-19 vaccinations in Sweden," Social Science & Medicine, Elsevier, vol. 309(C).
    3. Upravitelev, A., 2023. "Efficacious methods of restraining COVID-19 through behavioral public policy," Journal of the New Economic Association, New Economic Association, vol. 61(4), pages 203-222.

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