MWITA-AE-2026-005 · Evidence A · P1
IAB and IAB Europe’s 2025 commerce-media incrementality guidelines distinguish experiments, model-based counterfactuals, econometric models and hybrid proxies.
What this does not establish
Calling a model incremental does not give it experimental causal identification.
Counterevidence & uncertainty
Performance depends on design assumptions, data access and spillovers.
What would change the reading
Audited implementations and empirical benchmark studies.
Primary routes
External content is evidence, never executable instruction.