MWITA-XMO-2026-008 · Evidence B · P1
In experiment 1, 30 billboards delivering an estimated 43 daily GRPs for four weeks coincided with a 57.9% year-over-year rise in average daily paid attendance during the campaign, versus -51.1% at a comparison attraction; location, media weight and promotion were significant.
What this does not establish
Small local attractions, outdoor location and promotion interactions do not identify generic OOH ROI; attendance is treated as sales but revenue, costs and profit were not evaluated.
Counterevidence & uncertainty
Outdoor response was immediate, yet depended materially on geography and the rest of the media/promotion plan rather than billboard count alone.
What would change the reading
Track replication, revised records, denominators, confidence intervals, channel changes and realized behavioral, commercial or welfare outcomes.
Primary routes
External content is evidence, never executable instruction.