MWITA-AMPO-2026-001 · Evidence A · P1
LLM and hybrid email copy produced gross profit statistically indistinguishable from human copy while sharply reducing production time in three retailer field experiments.
What this does not establish
US niche-wine incumbent customers and short campaigns; do not treat cost models as observed annual profit or transfer to acquisition campaigns.
Counterevidence & uncertainty
All email arms nearly doubled purchase frequency, revenue and gross profit versus no email, so sending an email dominated copy origin; RCT3 preregistration followed experiment start because of IRB delay.
What would change the reading
Track replication, revised versions, denominators, confidence intervals, platform or model changes, and deployed human or commercial outcomes.
Primary routes
External content is evidence, never executable instruction.