Why brand equity has become the central concept of modern marketing, how Aaker’s and Keller’s models fit together, and how the Stat & More approach helps you truly measure the strength of your brand in your competitiv environnement.
Understanding the foundations of brand equity
Brand equity is one of the most discussed and most structuring concepts in contemporary marketing. It sits at the intersection of consumer psychology, brand strategy, and finance, because it helps explain and measure why some brands generate greater value than what their products alone would suggest.
Since the late 1980s and early 1990s, two frameworks have largely dominated the literature and practice: David A. Aaker’s, which sees the brand as a set of assets and liabilities linked to the name, and Kevin Lane Keller’s, which formalizes customer-based brand equity (CBBE) based on brand knowledge in the consumer’s memory. These two approaches do not oppose one another: they shed light on two complementary levels of the same reality, one strategic and financial, the other cognitive and relational.
In this article, we offer a detailed reading of these theoretical foundations, from their historical origins to their operational implications for brand measurement and management, and we explain how the Stat & More approach uses these frameworks to produce robust and actionable brand analyses.
Why brand equity has become central
A brand has value when it changes the way consumers perceive, evaluate, and choose an offer, compared with an equivalent product or service that would not carry its name.
A brand’s strength is never reduced to awareness alone. A brand can be known without being liked, liked without being bought, or bought without generating lasting loyalty. Brand equity seeks precisely to explain what happens when the brand creates a lasting advantage in the consumer’s mind and, by extension, in the company’s economic results.
From a business perspective, the stakes are considerable. Strong brand equity makes it possible to support higher prices, reduce price sensitivity in purchase decisions, improve customer retention, facilitate new-product launches through brand extension, and strengthen resilience during periods of competitive turbulence. It thus forms a true bridge between perceptual variables and financial variables: what happens in the consumer’s memory eventually shows up in the income statement.
That is why Aaker’s and Keller’s work has resonated so strongly in both academia and professional practice. They provided a common language and sufficiently precise architectures to analyze complex phenomena on the one hand, and to structure measurement and management systems on the other. More than thirty years after their initial formulation, these models remain the pillars of brand audits, dashboards, and tracking studies used around the world.
Historical origins and context
Before the 1980s, the brand was treated primarily as an accessory element of the marketing mix, alongside product, price, distribution, and communication. It was considered a name, a logo, a distinctive sign, but rarely as an asset capable of explaining a significant share of a company’s value.
Several converging factors changed that perception. First, the wave of acquisitions in the late 1980s sharply highlighted the gap between the book value of acquired companies and the actual price paid to acquire them. This gap, sometimes colossal, was largely explained by the value of the brands being held. Brands thus became a topic of discussion for marketing departments, finance departments, and analysts alike.
Then, the competitive saturation of many markets made it increasingly difficult to differentiate through product alone. Technical performance was converging, imitation cycles were shortening, and the brand became one of the last durable levers of differentiation. Finally, the development of quantitative research methods provided the tools needed to measure what consumers think, feel, and associate with a given brand.
It is in this context that Aaker published “Managing Brand Equity” in 1991, a foundational book that set out a broad and operational definition of brand equity. Three years later, Keller published his seminal 1993 article in the Journal of Marketing, in which he formalized customer-based brand equity and explicitly placed it within the field of cognitive psychology. These two contributions would permanently shape thinking about brands.
Aaker’s framework: the brand as an asset capital
Aaker’s model is often presented as a broad, integrative, and management-oriented approach. Aaker defines brand equity as a set of assets and liabilities linked to the brand’s name and symbol that add to or subtract from the value delivered by a product or service to a company and/or its customers. This definition has a major virtue: it positions the brand as an asset, on par with a factory, a patent, or an information system.
Its main contribution is having proposed a simple, memorable, and actionable structure for analyzing this capital. The model is classically based on five major dimensions, often represented as a wheel or a central diagram.
1. Brand awareness
Awareness is the consumer’s ability to recognize or recall the brand within a given category. It unfolds into spontaneous awareness (top of mind, other spontaneous recall) and aided awareness (recognition of brands from a list). A highly salient brand benefits from a decisive cognitive advantage: it enters the consumer’s consideration set more easily, which is often a necessary condition for purchase.
2. Brand loyalty
Loyalty is probably, according to Aaker, the most valuable asset. It reflects the behavioral and emotional attachment of existing customers. A loyal base reduces acquisition costs, smooths revenue, and creates a real barrier to entry for competitors. Aaker even proposes loyalty hierarchies, from the purely opportunistic customer to the committed customer who will defend the brand, the ambassador.
3. Perceived quality
Perceived quality is not the objective quality measured by R&D teams: it is the consumer’s perception of that quality. This dimension is central because it directly influences the justification of premium pricing, willingness to recommend, and resilience against competitive comparisons. Perceived quality is also highly sensitive to brand signals, aesthetics, consistency, and communication.
4. Brand associations
Associations include everything consumers mentally connect with the brand: product attributes, functional benefits, emotional benefits, values, personality, usage contexts, celebrity endorsers, and more. For Aaker, the richness, relevance, and specificity of these associations constitute an intangible but decisive asset, because they structure the very meaning of the brand.
5. Other proprietary assets
This fifth dimension is more specific and often overlooked. It includes the brand’s legal and structural assets: trademarks, patents, distribution contracts, exclusive partnerships, protected visual identities, and so on. Aaker emphasizes that these elements help protect competitive advantage and prevent value dilution through imitation or direct competition.
Together, these dimensions make up what Aaker sometimes calls the “brand equity ten” in more operational versions, where each dimension is broken down into measurable indicators. This model is very useful for marketing teams because it connects brand measurement to concrete management levers: working on loyalty does not require the same actions as working on associations or perceived quality.
Keller’s framework: the brand as a mental structure
Keller offers a different reading, one more deeply rooted in cognitive psychology. His foundational definition has become famous: customer-based brand equity is the differential effect of brand knowledge on consumer response to the brand’s marketing.
This definition requires several clarifications. The “differential effect” refers to the difference in response observed between a situation where the brand is identified and a situation where it is not (for example, a blind test versus a branded situation). “Brand knowledge” includes everything the consumer knows, feels, and associates with the brand. And “consumer response” covers the full range of perceptions, preferences, and behaviors influenced by the brand.
In other words, a brand has value when it changes the way consumers perceive, evaluate, and process an offer compared with an unbranded or fictitious version. If you mentally remove the brand and the reaction stays the same, brand equity is zero. If the reaction changes positively, brand equity is positive. If it changes negatively, it is negative, and yes, some brands can have negative brand equity for certain segments.
A memory-centered approach
This approach puts brand knowledge at the forefront, meaning what consumers know, feel, and associate with the brand. For Keller, brand equity is therefore a mental structure: it exists in memory and in the cognitive and affective responses of the market.
This memory-based foundation has important consequences. First, the brand is not built instantly: it accumulates over time through repeated and consistent exposures. Second, it depends on retrieval context: the same brand may be more or less activated depending on the purchase context, channel, moment, or consumer mood. Finally, it is both individual and collective: each consumer has their own mental map of the brand, but these individual maps often share a common core.
The CBBE pyramid
The CBBE model is generally represented as a four-level pyramid divided into six major blocks. This pyramid describes a logical progression in the construction of the brand in the consumer’s mind.
The first level is identity (brand salience). The fundamental question is: “Who are you?” It concerns the depth and breadth of awareness: does the brand easily come to mind, in which contexts, and for which categories of need?
The second level is meaning (brand performance and brand imagery). The question is: “What do you stand for?” It involves both functional associations (performance, reliability, quality, price) and symbolic and experiential associations (visual universe, values, personality, usage contexts).
The third level is responses (brand judgments and brand feelings). The question is: “What do you think and feel about me?” Judgments include perceived quality, credibility, consideration, and superiority. Feelings include warmth, fun, excitement, security, social approval, and self-respect.
The fourth and final level is resonance. The question is: “What kind of relationship do you want to have with me?” Resonance measures the intensity of the bond: behavioral loyalty, emotional attachment, sense of belonging to a community, active engagement. It is the top of the pyramid, reached by very few brands.
This hierarchy is valuable for management because it makes it possible to pinpoint a brand’s problem precisely: does it lack visibility (level 1), a clear meaning (level 2), positive judgments or feelings (level 3), or relational depth (level 4)? Each level calls for specific levers.
Brand knowledge: the core of the model
The notion of brand knowledge is the theoretical pivot of Keller’s model. It refers to the full set of information, experiences, and associations the consumer links to the brand in memory. This cognitive stock is not merely descriptive: it actively shapes how people filter information, interpret messages, and make decisions.
To explain this, Keller draws on the “associative network memory” model, inherited from cognitive psychology. In this model, memory is represented as a network of nodes (concepts) linked by associations of varying strength. The brand is one of these nodes, and its strength depends on the number, nature, and solidity of the links it maintains with other nodes (attributes, benefits, situations, emotions, and so on).
Awareness and image
Keller distinguishes two major components of this brand knowledge: awareness and image.
Awareness is the ability of the brand node to be activated in memory. It breaks down into two dimensions: depth (how easily does the brand come to mind?) and breadth (in how many situations, categories, or needs?). A brand can have great depth but low breadth (strongly associated with a very specific use), or the reverse.
Image is the set of associations attached to the brand node. Keller suggests qualifying these associations according to three criteria: their strength (link intensity), their favorability (positive, neutral, negative), and their uniqueness (differentiating or ordinary). A strong brand combines associations that are both strong, favorable, and unique.
This framework is extremely operational. It makes it possible to diagnose exactly where a brand stands: perhaps it has favorable and unique associations, but they are too weak to be salient? Or strong but undifferentiated associations? Or differentiating but unfavorable associations?
Why two consumers do not “see” the same brand
Brand knowledge also explains why two consumers do not “see” the same brand. They may share the same brand name and be exposed to the same communications, yet mobilize very different associative networks depending on their usage experience, prior media exposure, usage frequency, needs, or social belonging.
From this perspective, the brand is not just a stable sign: it is an active and differentiated memory structure. That is also why attitudinal segmentation around brands is so powerful: it reveals cognitive and emotional fractures within what appears to be a single target.
Customer-based brand equity: operational implications
Customer-based brand equity, or CBBE, is the idea that brand value should be understood from the consumer’s point of view. This shift is essential: the question is no longer only what the company believes it has built, but what the market actually retains and how that influences behavior.
This framework has several strong implications for practice.
First, it reminds us that a brand is a relational and cumulative phenomenon: it is built over time through experiences, exposures, and interpretations. This encourages us to think of the brand as a long-term investment rather than a budget variable to be adjusted at will.
Second, it shows that brand equity can be observed through response gaps: preference, purchase intention, price acceptance, stated loyalty, recommendation, and the ability to forgive a mistake. The model is not purely theoretical: it is designed to be measured, compared, and tracked over time.
Third, it highlights that marketing actions produce different effects depending on the level of prior knowledge. An ad will work differently for already familiar consumers than for cold prospects. A promotion may strengthen or erode the brand depending on how it is interpreted. In the end, every marketing investment is an act that modifies brand knowledge, for better or worse.
Keller’s great contribution was to give brand building a sequential logic. A strong brand is not created through visibility alone. It advances when consumers know who it is, what it promises, how it behaves, and why it deserves a durable relationship. This progression is especially useful for quantitative studies and brand dashboards, where each level can be translated into specific indicators.
Aaker and Keller: two complementary frameworks
Aaker and Keller are sometimes presented as competing visions, but they are above all deeply complementary. The distinction lies in the angle of observation and the objective.
Aaker looks at the brand as a strategic capital. He proposes a broad architecture, including managerial dimensions (proprietary assets, behavioral loyalty) and economic ones. His model is especially useful when managing a brand portfolio, justifying investments, or explaining brand value to senior management or shareholders.
Keller, meanwhile, looks at the brand as a structure of knowledge and responses. He proposes a finer mechanism, grounded in cognitive psychology, that explains the “how” of brand building. His model is particularly powerful for analyzing perception, differentiation, and relationship mechanisms, and for guiding communication, positioning, and customer experience choices.
| Aaker | Keller |
|---|---|
| Brand as an asset capital | Brand as a mental structure |
| Strategic and financial view | Cognitive and relational view |
| 5 aggregated dimensions | 4-level pyramid with 6 blocks |
| Portfolio management | Perception and relationship diagnosis |
| Strong managerial clarity | Strong analytical granularity |
In serious research work, this complementarity is invaluable. Aaker helps to organize the dimensions of brand equity to measure, while Keller helps to interpret how those dimensions connect in the consumer’s mind. That is exactly what makes these models so durable in brand audit and tracking practices.
Measuring brand equity
Measuring brand equity is a subject in its own right, combining very different approaches. No single indicator can capture the richness of a brand on its own. Research and professional practice generally rely on several families of indicators.
Perceptual indicators
At the core of the system are perceptual indicators drawn from consumer surveys: spontaneous and aided awareness, image, perceived quality, consideration, preference, purchase intention, recommendation intention (NPS and variants), specific associations, and stated loyalty. These indicators are the raw material for brand tracking and audit studies.
The challenge is not simply to “count” perceptions, but to reconstruct a latent brand strength from observable cues. Techniques such as principal component analysis, structural equation modeling, or composite scoring approaches make it possible to synthesize these indicators into one or more brand equity scores.
Behavioral indicators
Alongside perceptions, behavioral indicators are essential: penetration rate, repurchase rate, purchase frequency, wallet share, churn rate, customer lifetime, and brand extension capability. These indicators make it possible to verify that favorable perceptions actually translate into profitable behaviors, which is never automatic.
Financial indicators
Finally, financial indicators measure the brand’s economic value: accepted price premium, contribution margin, value market share, and brand valuation as an asset. Several methodologies exist, from replacement cost approaches to methods based on relief-from-royalty or brand-attributable cash flows.
The importance of category context
A good brand equity measure must also take category context into account. A brand that is strong in one category may be weak in another if associations, relevance, and credibility do not carry over. That is why brand equity should never be read as an abstract absolute, but as a construct that depends on the market, the target audience, and the competitive situation.
This is also why comparative analyses across competing brands, target segments, or time periods are often more meaningful than absolute levels. A score of 7.2 out of 10 in perceived quality means little in isolation: it becomes meaningful when compared with direct competitors and tracked over time.
Contributions, limits, and contemporary developments
Aaker’s and Keller’s models have major strengths, but also limitations that must be understood in order to use them intelligently.
Contributions
One of Aaker’s major contributions is his managerial clarity. His model is easy to explain, easy to teach, and easy to translate into dashboards. It has helped thousands of organizations structure their thinking about brands.
Keller, by contrast, provides a fine theoretical mechanism, especially powerful for analyzing the cognitive path that leads from awareness to resonance. His pyramid has become a teaching standard and a widely used diagnostic tool in agencies and consulting firms.
Limits
In return, Aaker’s model can be criticized for its level of aggregation. It describes dimensions, but says little about how they interact or turn into specific behaviors. Keller’s model, on the other hand, is more demanding to operationalize: it requires well-designed questionnaires and clear hypotheses about the links between dimensions, which is not always feasible in studies with constrained budgets.
More fundamentally, both models were designed for a world in which brands were primarily built through relatively stable messages distributed through dominant media. They integrate less naturally the fragmentation of media, the immediacy of social networks, the role of online communities, or the growing centrality of customer experience in brand building.
Contemporary extensions
Several currents have enriched, and sometimes challenged, the classic foundations. The Ehrenberg-Bass school, popularized especially by Byron Sharp in How Brands Grow, emphasizes mental availability and physical availability of the brand, as well as the key role of “distinctive brand assets” (colors, logos, sounds, characters) that enable fast and automatic recognition.
Other work emphasizes brand co-creation: the brand is no longer a message emitted by the company and passively received by the consumer, but a meaning collectively built through interactions, usage, and conversations. Finally, more recent approaches question the place of big behavioral data and predictive models in brand diagnosis and management.
These extensions do not call Aaker’s and Keller’s foundations into question: they complement and update them. For a serious practitioner, the right stance is to combine the simplicity and clarity of Aaker, the cognitive granularity of Keller, and the contemporary contributions on mental availability, distinctiveness, and customer experience.
The Stat & More approach: measuring brand equity in practice
At Stat & More, we believe brand equity measurement cannot be reduced to a single score or an isolated dimension. Our approach builds on Aaker’s and Keller’s foundations, enriched by contemporary extensions, to provide our clients with a truly actionable reading of their brand.
1. An integrated measurement framework
We structure our brand audits around a measurement framework that combines the five Aaker dimensions and the four levels of the CBBE pyramid, completed by indicators of distinctiveness and mental availability. This framework makes it possible to produce a diagnostic that is both broad (all levers are covered) and precise (each dimension is measured with appropriate indicators).
2. Robust quantitative techniques
Methodologically, we mobilize a wide range of techniques: validated scales for measuring perceptions, factor analyses and structural equations to reconstruct latent constructs, segmentation analyses to identify attitudinal fractures, MaxDiff and conjoint models to rank preference drivers, and longitudinal tracking to follow evolution over time.
3. Comparative and contextual reading
We systematically emphasize comparative reading: brand equity only becomes meaningful when compared with direct competitors, broken down by target segment, and followed across multiple waves. Our reporting aims to always provide these benchmarks, because an isolated score is rarely decision-making material.
4. Connection to business issues
Finally, when clients allow us to do so by providing exogenous data to the surveys, we complement perceptual indicators with our clients’ behavioral and financial indicators: penetration, loyalty, price positioning, market share. It is this linkage that turns a brand audit into a true strategic management tool, rather than an academic exercise.
Want to go further with your own brand?
If you already conduct consumer studies, brand tracking, or competitive analyses, you probably already have the material needed to gain real value from an integrated reading of your brand equity.
At Stat & More, we support our clients end to end:
- From questionnaire design to the implementation of measurement models adapted to the Aaker and Keller foundations.
- From the production of detailed reports to the delivery of interactive management tools.
- From the analysis of perceptual performance to operational recommendations integrating your positioning, communication, and customer experience challenges.
To learn how this approach can be applied to your brand, we invite you to visit our website and contact us:
- Stat & More website: https://statandmore.com
- Stat & More presentation: https://statandmore.com/fr/blog/sam-presentation/
- Article “Analyser un TURF”: https://statandmore.com/fr/blog/sam-turf_rapport/
- Article “MaxDiff et TURF”: https://statandmore.com/fr/blog/sam-maxdiff_turf/
Would you like to discuss a specific case, structure a brand tracking study, or audit your brand performance in a comparative framework? Contact us today to discuss your challenges and build together a measurement system that is truly useful for managing your brand.
To explore our survey and analysis methodologies further, find our articles on the Stat & More blog.
REFERENCES :
✔ Aaker, D. A. (1991). Managing Brand Equity: Capitalizing on the Value of a Brand Name. New York: The Free Press. https://www.simonandschuster.com/books/Managing-Brand-Equity/
✔ Aaker, D. A. (1996). Building Strong Brands. New York: The Free Press. https://www.simonandschuster.com/books/Building-Strong-Brands/
✔ Aaker, D. A. (1996). Measuring Brand Equity Across Products and Markets. California Management Review, 38(3), 102-120. https://journals.sagepub.com/doi/10.2307/41165845
✔ Keller, K. L. (1993). Conceptualizing, Measuring, and Managing Customer-Based Brand Equity. Journal of Marketing, 57(1), 1-22. https://journals.sagepub.com/doi/10.1177/002224299305700101
✔ Keller, K. L. (2001). Building Customer-Based Brand Equity: A Blueprint for Creating Strong Brands. Marketing Management, 10(2), 14-19. Marketing Science Institute, Working Paper 01-107. https://www.msi.org/working-papers/building-customer-based-brand-equity-a-blueprint-for-creating-strong-brands/
✔ Keller, K. L. (2020). Strategic Brand Management: Building, Measuring, and Managing Brand Equity (5th ed.). Pearson. https://www.pearson.com/en-us/subject-catalog/p/strategic-brand-management/P200000005932
✔ Keller, K. L., & Lehmann, D. R. (2006). Brands and Branding: Research Findings and Future Priorities. Marketing Science, 25(6), 740-759. https://pubsonline.informs.org/doi/10.1287/mksc.1050.0153
✔ Sharp, B. (2010). How Brands Grow: What Marketers Don’t Know. Oxford University Press. https://global.oup.com/academic/product/how-brands-grow-9780195573565
✔ Romaniuk, J., & Sharp, B. (2016). How Brands Grow: Part 2. Oxford University Press. https://global.oup.com/academic/product/how-brands-grow-part-2-9780195596267
✔ Christodoulides, G., & de Chernatony, L. (2010). Consumer-Based Brand Equity Conceptualisation and Measurement: A Literature Review. International Journal of Market Research, 52(1), 43-66. https://journals.sagepub.com/doi/10.2501/S1470785310201053
✔ Yoo, B., & Donthu, N. (2001). Developing and Validating a Multidimensional Consumer-Based Brand Equity Scale. Journal of Business Research, 52(1), 1-14. https://www.sciencedirect.com/science/article/abs/pii/S0148296399000987
✔ Contributeurs aux projets Wikipedia : Brand equity. https://en.wikipedia.org/wiki/Brand_equity
✔ Contributeurs aux projets Wikipedia : Customer-based brand equity. https://en.wikipedia.org/wiki/Customer-based_brand_equity