Brand-Pack Size Cannibalization Arising from Temporary Price Promotions

This study investigates how price promotions for one pack-size of a brand steal sales from the other pack-sizes of the same brand. To do so, the study examines twelve grocery product categories (seven US, three UK, two Australian). The analysis finds heavy cross-pack cannibalization. On average, 22 percent of the sales uplift for a promoted brand-pack size comes from other pack sizes of the same brand. Cross-pack cannibalization most typically occurs in the week of the promotion, but also transfers future week's sales away from the non-promoted pack size in 31 percent of cases. The study finds higher cannibalization is associated with packs that sell for a higher dollar value than others sold under the same brand; whereas higher price-per-weight, a packaging difference, and the item having a larger relative share of sales in the brand portfolio, are linked to lower cannibalization. Also examined is the impact of pack-size cannibalization on promotion profitability for retailer PLs. That analysis finds PL price promotions have generally negative impacts on PL profits, and that pack-size cannibalization exacerbates this negative outcome. The results suggest both retailers and manufacturers should carefully consider pack-size cannibalization when evaluating the outcome of temporary price promotions. The study also provides some evidence-based recommendations from which managers can attempt to minimize such cannibalization.