![]() We discuss the theoretical and managerial implications of these findings. ![]() We find that both extrinsic and intrinsic cross-category effects are asymmetric, that is, different categories and subcategories have different effects on one another. We also estimate a system of salty snack subcategory purchase models. Using aggregate store level data together with store descriptor and store shopper demographic data, we estimate a simultaneous system of models for two related product categories, soft drinks and salty snacks. We consider both extrinsic (aisle location-based) and intrinsic (affinity-based) cross-category effects. In managing two related product categories, retailers face some important questions: Which category should be stocked more? How close to each other should they be stocked in the store (aisle adjacency)? Which category should be promoted more often? And when should the two categories be sold as a bundle? To address these questions, we examine how purchases of related product and subproduct categories influence one another, and how the relative aisle locations of two related product categories influence their respective purchases. An important part of the rapidly growing shopper marketing practice is cross-category retail management.
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