HALO EFFECT
Definition
The halo effect refers to the phenomenon where the price of a product (often a flagship or highly visible item) influences the overall perception of a retailer's price image.
If key references are perceived as inexpensive, the entire assortment is perceived as competitive, even if certain products are actually more expensive
This is a powerful lever for building a pricing reputation without having to lower prices across the entire catalog.
1,000 products on display, a consistent price perception across the entire chain
Mass Merchandising — 30,000 SKUs in total
Some customers perceive the chain as "one of the least expensive, " even though its overall price index isn't particularly notable.
strictly aligned with the lowest price on the market
Margin maintained on the other 29,000 items
Why is this important to know?
- Optimizing price image while controlling costs: Aggressively aligning a few hundred KVIs is enough to establish credibility for the retailer's entire brand image.
- Boosting margins on non-KVIs: While KVIs drive the brand image, other products can maintain a more generous margin.
- Driving store traffic: A strong price image attracts customers in-store or online, who then discover the broader product offering.
Example
A mass-market retailer selects 1,000 KVIs out of its 30,000 references. Across these 1,000 items, it strictly aligns with the lowest market price.
Across the other 29,000 references, it maintains its normal pricing policy, with an average margin 3 to 5 points higher
Shopper studies reveal that 78% of customers perceive the retailer as "among the cheapest", even though its overall price index is unremarkable
The halo effect has done its job.
How to measure / use it?
Activating the halo effect requires three steps:
1) identifying KVIs (products that consumers actively compare, typically 3% to 8% of the assortment),
2) applying a strict price alignment policy on these KVIs,
3) measure perception via shopper studies and cross-reference it with the actual price index to validate the effect
Modern analytics tools enable automated detection of KVIs from in-store scan data and online behaviors.
Pitfalls to avoid
- Misidentifying KVIs: Aligning products that no longer drive comparison destroys margins without improving brand image.
- Measuring only image, not sales: A successful halo effect also translates into increased traffic and basket size, not just perception.
- Confusing KVIs with best-sellers: A product can sell in high volumes without being a price benchmark, and vice versa.
For more information, see our article on measuring price elasticity.
FAQ
The halo effect refers to the influence that a product, brand, or pricing decision can exert on the perception of other products within the same range or retailer
In retail, the price of a few highly visible references can alter the overall perception of prices charged by the distributor.
Consumers memorize only a limited number of prices
They often build their perception of a retailer based on a few flagship or frequently purchased products
Optimizing the pricing of these references therefore improves the overall price image without requiring adjustments to the entire assortment.
The halo effect acts on consumer perception and influences their judgment of a product range or retailer
Cannibalization, on the other hand, corresponds to an actual transfer of sales between two products
One pertains to perception, the other to observed purchasing behavior.
Retailers often concentrate their efforts on the most visible products, known as KVIs (Known Value Items), to reinforce their price image
An attractive pricing policy on these references can positively influence consumer perception of the entire offering.
Measuring the halo effect relies on analyzing sales, purchasing behaviors, consumer studies, and pricing simulations
Artificial intelligence tools also make it possible to identify products that exert the greatest influence on overall price perception and to estimate the impact of a pricing change on the entire category.
The halo effect is one of the dimensions to integrate in order to measure price elasticity beyond a single adjusted reference.
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