A mega-study of text-message nudges encouraging patients to get vaccinated at their pharmacy
We partnered with Walmart to test 22 nudges designed to boost vaccination rates in their
pharmacies. Nudges were delivered via text message to over 650,000 Walmart pharmacy
patients in the fall of 2020 and encouraged patients to visit Walmart for a flu vaccine. We
demonstrate that behaviorally informed messages increase pharmacy vaccination rates by
an average of 6.7% over a roughly three-month follow-up period. The most effective
messages in our field experiment matched the tone of typical pharmacy communications …
pharmacies. Nudges were delivered via text message to over 650,000 Walmart pharmacy
patients in the fall of 2020 and encouraged patients to visit Walmart for a flu vaccine. We
demonstrate that behaviorally informed messages increase pharmacy vaccination rates by
an average of 6.7% over a roughly three-month follow-up period. The most effective
messages in our field experiment matched the tone of typical pharmacy communications …
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