---
id: "claim-ratings-and-price-are-universal"
type: "claim"
source_timestamps: ["§ What We Found", "§ Get the fundamentals right first."]
tags: ["e-commerce-fundamentals", "ai-decision-making"]
related: ["action-ensure-fundamentals", "claim-traditional-marketing-fails"]
confidence: "high"
testable: true
speakers: ["Jafar Sabbah", "Oguz A. Acar"]
sources: ["geo"]
sourceVaultSlug: "hbr-seg-geo"
originDay: 3
articleStem: "hbr-tier2-06-ai-shopping-agents"
sourceUrl: "https://hbr.org/2026/05/research-traditional-marketing-doesnt-work-on-ai-shopping-agents"
sourceTitle: "Research: Traditional Marketing Doesn’t Work on AI Shopping Agents"
---
# Only ratings and price consistently influence AI agents across models

**Claim (confidence: high · testable: true):** Of eight tested promotional mechanisms, only two fundamentals behaved consistently across **all four models** and **all four product categories**:

1. **Star ratings** consistently pushed product choices **upward**.
2. **Higher prices** consistently reduced selection.

These two signals mirror human reliance on **quality** and **cost**, making them the **only reliable levers** for influencing AI shopping agents. This directly motivates the first, foundational action item: [[action-ensure-fundamentals|secure pricing and rating fundamentals]] before investing in anything more exotic. It is the positive complement to [[claim-traditional-marketing-fails]] (the failure of *everything else*).

**Enrichment / external corroboration:** Secondary reporting states that among the eight mechanisms, ratings were the one that "behaved consistently as it does for human buyers," and that agents treat price rationally (higher price → lower selection likelihood). ACES/ACE confirms agents show **near-perfect consistency in basic economic rationality tasks**, particularly price sensitivity and quality proxies. Strongly supported.

**Related:** [[action-ensure-fundamentals]] · [[claim-traditional-marketing-fails]] · [[concept-ai-shopping-agents]]


## Related across articles
- [[claim-objective-factors-over-brand-loyalty]]
- [[claim-traditional-marketing-fails]]