Imperial College London
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ProfessorKatharinaHauck

Faculty of Medicine, School of Public Health

Professor in Health Economics
 
 
 
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Contact

 

+44 (0)20 7594 9197k.hauck Website

 
 
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Assistant

 

Ms Julie Middleton +44 (0)20 7594 3284

 
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Location

 

Office 502School of Public HealthWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Galizzi:2022:10.1002/hec.4467,
author = {Galizzi, M and Lau, K and Miraldo, M and Hauck, K},
doi = {10.1002/hec.4467},
journal = {Health Economics},
pages = {614--646},
title = {Bandwagoning, free-riding and heterogeneity in influenza vaccine decisions: an online experiment},
url = {http://dx.doi.org/10.1002/hec.4467},
volume = {31},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - ‘Nudge’-based  social  norms  messages  conveying  high  population  influenza  vaccination coverage levels can encourage vaccination due to bandwagoning effects but also discourage vaccination due  to  free-riding  effects  on  low  risk  of  infection,  making  their  impact  on  vaccination  uptake ambiguous.We develop a theoretical framework to capture heterogeneity around vaccination behaviors, and empirically measure the causal effects of different messages about vaccination coverage rates on four self-reported and behavioral vaccination intention measures. In an online experiment, N = 1,365 UK adults are randomly assigned to one of seven treatment groups with different messages about their social environment’s coverage rate (varied between 10% and 95%), or a control group with no message. We find that treated groups have significantly greater vaccination intention than the control. Treatment effects increase with the coverage rate up to a 75% level, consistent with a bandwagoning effect. For coverage rates above 75%, the treatment effects, albeit still positive, stop increasing and remain flat (or even decline). Our results suggest that, at higher coverage rates, free-riding behavior may partially crowd out bandwagoning effects of coverage rates messages. We also find significant heterogeneity of these effects depending on the invidual perceptions of risks of infection and of the coverage rates.
AU  - Galizzi,M
AU  - Lau,K
AU  - Miraldo,M
AU  - Hauck,K
DO  - 10.1002/hec.4467
EP  - 646
PY  - 2022///
SN  - 1057-9230
SP  - 614
TI  - Bandwagoning, free-riding and heterogeneity in influenza vaccine decisions: an online experiment
T2  - Health Economics
UR  - http://dx.doi.org/10.1002/hec.4467
UR  - http://hdl.handle.net/10044/1/93056
VL  - 31
ER  -
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