
Performance Marketing
Multi-Touch Incrementality Testing: Proving True Paid Media Lift with Geo-Holdout Tests
Why observational attribution models and platform dashboards inflate ROAS by measuring correlation rather than causation: designing matched-market geo-holdout tests, synthetic counterfactual baselines with CausalImpact, and exposing non-incremental retargeting and branded search cannibalization.
9/28/2026
18 min