Intervention
DISEASE
The experiment has four treatments that are delivered in a short video:Treatment 1: a 45-s placebo video that provides general information about the benefit of using solar power to charge household electrical appliances.Treatment 2: a 45-s standard health COVID-19 vaccine promotional and information video (modeled on the videos produced by the US Centers for Disease Control and Prevention (CDC)).Treatment 3: low cash incentive treatment. The first 30 s are identical to the health video; the last 15 s inform viewers that they will earn $3 (20 Ghana cedis) if they receive the COVID-19 vaccine within the next 6 weeks.Treatment 4: high cash incentive treatment. The first 30 s are identical to the health video; the last 15 s inform viewers that they will earn $10 (60 Ghana cedis) if they receive the COVID-19 vaccine within the next 6 weeks.The four treatment videos are available at Individuals were compensated with 5 Ghana cedis immediately after this phase I intervention; they received an additional 5 Ghana cedis for their participation in the phase II/III post-treatment survey. Signed consent to participate in the RCT was obtained from each participant; the full text of the signed consent can be found in the text of the phase I questionnaire.