Science Advances

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• Supplementary Text
• Fig. S1. Illustrative map of 106 sampled communities and mobile phone towers.
• Fig. S2. Illustrative map of sampled communities in an urban area, Port Harcourt.
• Fig. S3. Ex ante predictions for rates of corruption reporting per treatment condition.
• Fig. S4. Difference in perceptions of social norms regarding corruption and corruption reporting.
• Fig. S5. Difference in perceptions of social norms regarding corruption and corruption reporting, for police and bureaucrat corruption and government corruption.
• Table S1. Summary of text messages received in response to the two study campaigns.
• Table S2. Corruption messages sent as a result of the treatment film and mass text.
• Table S3. Changes in social norms outcomes as a result of the treatment film.
• Table S4. Summary statistics for items in social norms outcome indices.
• Table S5. Full text of survey questions and response scales used in the design and analysis.
• Table S6. Corruption messages sent as a result of the treatment film and mass text, averaged over the period before the mass text and the period after.
• Table S7. Corruption messages sent as a result of the treatment film and mass text, dropping communities with no film watchers.
• Table S8. Corruption messages sent as a result of the treatment film and mass text, dropping communities that received the mass text early.
• Table S9. Corruption messages sent as a result of the treatment film and mass text, using assigned mass text send date.
• Table S10. Corruption messages sent as a result of the treatment film and mass text, controlling for week of film distribution.
• Table S11. Corruption messages sent as a result of the treatment film and mass text interaction, with distribution duration control.
• Table S12. Messages related to corruption that are not detailed corruption reports sent as a result of the treatment film and mass text.
• Table S13. Changes in social norms outcomes as a result of the treatment film, controlling for individual-level covariates.
• Table S14. Changes in social norms outcomes as a result of the treatment film, controlling for week of film distribution start.
• Table S15. Changes in social norms outcomes as a result of the treatment film, controlling for the duration of film distribution.
• Table S16. Changes in social norms outcomes as a result of the treatment film, with enumerator fixed effects.

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