MWITA-ELO-2026-009 · Evidence A · P1
Across three randomized field experiments, authority cues in sender names or subject lines sometimes improved early detected opens but did not improve clicks; the initially selected subject-line winner was not statistically significant when measured at 30 days, indicating a winner-timing/fade-out problem.
What this does not establish
An authority cue is not verified expertise or trust, and an open pixel event is not a click, purchase, revenue or retention outcome. The product category and prior-nonopener segment narrow transportability.
Counterevidence & uncertainty
The apparent 24-hour winner faded to a nonsignificant difference by day 30, showing that automated early stopping can overstate durable subject-line effects.
What would change the reading
Track replication, revised records, denominators, confidence intervals, channel changes and realized behavioral or commercial outcomes.
Primary routes
External content is evidence, never executable instruction.