MWITA-AE-2026-033 · Evidence C · P1
Google’s 2025 guidance distinguishes incrementality experiments, marketing-mix models and attribution as answering causal campaign, aggregate portfolio and touchpoint-credit questions respectively.
What this does not establish
Combining tools does not automatically remove vendor bias or model error.
Counterevidence & uncertainty
Each method’s validity depends on data and assumptions.
What would change the reading
Independent benchmark against known experiments.
Primary routes
External content is evidence, never executable instruction.