Research paper
Van Nierop E, Fok D, Franses PH. Interaction between shelf layout and marketing effectiveness and its impact on optimizing shelf arrangements. Marketing Science. 2008;27(6):1065-1082. doi:10.1287/mksc.1080.0365
Why we cite it
Support for the "eye level is buy level" principle (**1,000 citations**), from **real Dutch supermarket scanner data**, modelling how vertical shelf position relates to product sales.
**Two limits this section did not carry until 2026-09-02 (card SP97Y7).**
**1. The authors hedge their own results.** The abstract says *"we **appear to** be able to increase profits for all the stores analyzed, and our approach **appears to** outperform well-known rules of thumb."* The gains are from a **simulated-annealing optimisation over a fitted model**, not a field trial — **no shelf was actually rearranged and no shopper was observed.**
**2. The outcome is sales, not eating.** This is marketing science: the dependent variable is **SKU sales and profit**, and the paper's purpose is shelf-layout optimisation for retailers. **That someone buys more of a product placed at eye level is not the same claim as that they eat more of it**, and this record cannot close that gap. Cite it for placement-and-purchasing; cite something else for consumption. Uses a Hierarchical Bayes model with Dutch supermarket data to show that eye-level placement (shelf levels 3-4 on a 5-shelf rack) produces the highest sales, and that shelf position also moderates the effectiveness of other marketing instruments like promotions. The optimization model demonstrates substantial profit gains over standard retail rules of thumb.