MWITA-RM-2026-041 · Evidence A · P1
Meridian GeoX primarily uses time-based regression to model the counterfactual for geo experiments.
What this does not establish
A named counterfactual model is not proof its assumptions hold for a campaign.
Counterevidence & uncertainty
Pretrends, shocks, spillovers, and model choice can bias estimates.
What would change the reading
Sensitivity and placebo tests support the model.
Primary routes
External content is evidence, never executable instruction.