MWITA-PRO-2026-007 · Evidence A · P1
Price-equivalent multi-unit promotions increased units purchased relative to single-unit discounts, but the added items were less likely to be consumed.
What this does not establish
Perishable vegetables and quantity sales do not establish revenue, profit, category-wide effects or the same waste response for durable goods.
Counterevidence & uncertainty
The same promotion delivered a commercial volume lift and an adverse consumption or waste outcome; salient unit-price and needs prompts significantly reduced overpurchase.
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.