Sample frameDay 181·Brand Management · Equity

Good morning. Take your name off the product and ask again. Whatever changes is your brand.

Brand Management.

Customer-Based Brand Equity

5 min read·Apply by lunch

The question

If you handed your product to a stranger with the label stripped off — no name, no colours, no story about who made it — what would they pay for it, and what would they pay the moment you put the label back on? If you can't set those two numbers side by side, you've spent years funding an asset you have never once measured.

The idea

In 1993 the Journal of Marketing published a paper by Kevin Lane Keller — later the author of Strategic Brand Management, the standard textbook on the subject — that did something the field had been avoiding. It defined brand equity from the customer's side: the differential effect of brand knowledge on how a customer responds to the marketing of that brand. Read it slowly, because every word is carrying weight. Differential means it is a difference between two responses, not a quality your brand possesses. Brand knowledge means the difference lives inside a customer's memory rather than in your logo files or your balance sheet. And response means it shows up in behaviour — what they'll pay, what they'll try, what they'll forgive — not in how warmly they say they feel about you. The measurement follows straight from the definition: put the same product in front of people twice, once unbranded and once branded, and watch what moves. Pepsi built years of advertising on the blind half of that test alone, and it worked precisely because a blind answer and a branded answer are two different answers. The trap is treating equity as a stock of goodwill you have accumulated. It isn't a stock. It's a gap, it gets re-measured every time somebody chooses, and it can run negative.

The framework

01
Two answers, one product — the whole measurement.
Pick one thing you sell and collect two responses to it. The first is blind: the product, the spec, the outcome, with every trace of you removed — no name, no colours, no founder story. The second is identical except your name sits on it. Ask the same questions both times and make them behavioural: what would you pay, would you shortlist this, would you switch today. Six customers who don't know each other is enough to see a pattern. The gap between the two answers is your equity, and you now hold it as a number instead of a feeling.
02
What if the gap runs the other way?
Keller's definition allows the difference to be negative, and negative equity is far more common than anyone admits: a name that makes buyers more suspicious, slower to try, less willing to pay than they'd be with no name attached at all. Category baggage does it. So does a bad year people still remember. If your blind answer beats your branded answer, no amount of extra reach will save you — more people simply meet the thing that's costing you money. That's a repair job on what the name means, not a line item in a media plan.
03
The gap sits in someone else's memory, not on your asset register.
This is the practical consequence of putting knowledge at the centre of the definition. You don't own your brand equity in any useful sense; it lives distributed across the heads of people you'll never meet, and you reach it only through what they actually encounter. Which means every ad, every invoice, every support reply and every bit of packaging is a deposit or a withdrawal on the same account — and the surfaces customers meet weekly count for far more than the ones you commissioned. Find the surface they touch most often. It is doing most of the work, whoever owns it internally.
04
Re-run the test on a clock, not on a hunch.
A gap measured once is an anecdote; a gap measured the same way twice a year is an instrument. Fix the wording, the sample and the questions now, write them down, and repeat them on a date you've already put in the calendar — because the value of this measure is almost entirely in the trend. A widening gap means the last six months of work reached memory. A flat one means you bought attention and rented it. A narrowing gap is the earliest warning you will get that your name is turning into a commodity.

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