MWITA-RM-2026-039 · Evidence A · P1
IAB/MRC identifies randomized controlled trials as a method aimed at an unbiased baseline by random assignment to exposed and unexposed groups.
What this does not establish
Randomization alone does not cure noncompliance, spillovers, attrition, low power, or wrong estimand.
Counterevidence & uncertainty
Retail environments often have cross-device and household interference.
What would change the reading
A study reports design, balance, power, attrition, and confidence intervals.
Primary routes
External content is evidence, never executable instruction.