Retail measurement today depends on probabilistic matching: panel projections from sample populations, post-hoc loyalty-card reconciliation, modeled retail media attribution. None of these mechanisms provide a deterministic link between what a shopper considered and what they bought.
This paper documents a deployment at a regional grocery retailer in Miami-Dade where cart-mounted interactive screens capture more than thirty distinct types of in-aisle behavioral events — searches, dietary filters, banner views, product detail views, navigation — and link each engaged shopping session to its register receipt at session granularity through a barcode-scan join at checkout.
info Comparing engaged-session baskets in the deployment window against a multi-quarter pre-deployment baseline at the same retailer (item-count-floor matched). Full methodology, caveats and limits are documented in the paper.
session_id."
What the paper covers
- A new measurement primitive. The instrumentation captures the consideration moment — searches, dietary filters, banner views, navigation, dwell time — and joins each engaged session to its register receipt.
- Brand-level attribution from receipts — measured directly from POS, not modeled. The paper enumerates the top-10 national brands by basket-appearance rate and discusses the regional Hispanic-market category dynamics observed.
- Banner-to-basket attribution at session granularity. Every banner served on a Coupr screen is captured with banner name, brand, position, aisle and second-precision timestamp; the receipt joins on
session_id. No probabilistic stitching. - Methodology validation. Engaged-session baskets run substantially larger than the pre-deployment baseline — directional evidence that the engagement events captured by the instrumentation correlate to measurable downstream outcomes.
- Identity-graph extension. When a shopper authenticates at the cart, the resulting hashed identifier is a deterministic node that joins commercial identity graphs (RampID, AbiliTec, TruAudience, Beacons) into a layer they currently can't reach: the moment of decision, in the aisle.
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