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BRAND EQUITY AND CONSUMER INFORMATION PROCESSING: A PROPOSED MODEL

Andreas Strebinger Günter Schweiger Thomas Otter July 1998 Andreas Strebinger is research assistant in the Department of Advertising and Marketing Research at the Vienna University of Economics and Business Administration (Wirtschaftsuniversität Wien), Austria. Günter Schweiger is Professor of Advertising and Marketing Research at the Vienna University of Economics and Business Administration. Thomas Otter is research assistant in the Department of Advertising and Marketing Research at the Vienna University of Economics and Business Administration. The authors gratefully acknowledge the support of the Austrian Scientific Research Fund (Fonds zur Förderung der wissenschaftlichen Forschung) and the valuable comments of John C. Crawford and Gerald Häubl. Correspondence should be addressed to: Ordinariat für Werbewissenschaft und Marktforschung Institut für Absatzwirtschaft Wirtschaftsuniversität Wien Augasse 2-6 A-1090 Vienna Austria phone: +43 1 313 52 238 fax: +43 1 313 52 239

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BRAND EQUITY AND CONSUMER INFORMATION PROCESSING: A PROPOSED MODEL

ABSTRACT In the last decade, a lot of research has been dedicated to conceptualizing and measuring customer-based brand equity. However, apart from putting forth various influencing factors, no integrative framework has so far been developed to account for the complex psychological processes underlying the formation of customer-based brand equity. This paper attempts to propose such a framework by drawing on the theory of consumer information processing. Starting with ten input variables, the paper identifies four paths which lead to the output variable of intangible monetary customer-based brand equity: an informational path, an affective path, a social path, and a path via perceptual changes. Each of these paths involves several interacting variables. Extensions toward deriving company-based brand equity are discussed.

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1 Introduction

The overwhelming significance of brands for the consumers’ decision making is uncontested both in everyday practice and scientific research. In the field of international academic and non-academic research, a wide variety of models to conceptualize and measure "brand equity" have been developed over the past few years. To explain how brand equity is generated in the consumer’s mind, some detailed investigations of individual influencing factors as well as several synoptic approaches examining the influence of different variables on brand equity are available (cf. D. Aaker 1992a, 1992b; Biel 1995; Kapferer 1996; Keller 1993). We see a strong need for an integrative model which will • provide as comprehensive an overview as possible of the various influencing factors and • put them in relation to the psychological process taking place in the mind of the consumer. The present paper proposes such a model based on a conceptualization of brand and brand equity.

2 Conceptualization of brand and brand equity 2.1 Brand as a notion in the mind of the consumer

In the large gamut of definitions, two general perspectives can be discerned: • One perspective sees a brand as something visible, tangible, and maybe even audible. One typical definition is that of a brand as a "distinguishing name and/or symbol (such as a logo, trade-mark, or package design) intended to identify the goods or services of a seller or group of sellers, and to differentiate their goods or services from those of the competitors" (D. Aaker 1992a, p. 7). It thus puts the focus on the material side of the brand, regarding the consumers’ notion of the brand as a secondary criterion. • The other perspective - in the words of David Ogilvy - defines a brand as the "consumer´s idea of a product". When seen from this viewpoint, a brand is a schema or semantic 5

network which the consumer has acquired through a process of learning (e.g., BekmeierFeuerhahn 1996, p. 161ff; Keller 1993). Names and symbols are thus only seen as triggers of what the brand actually stands for. We feel the latter view to be more appropriate, especially when it comes to providing an explanatory model for the generation of brand equity through a psychological process. As a notion in the consumer’s mind we define the concept of ‘brand’ as the sum of associations that are evoked by names or symbols. Its scope, however, should not be limited to associations with the product. By the same token, associations with the firm behind a TV set brand, information on the dealer of a specific brand of car, or the consumer’s ability to memorize the telephone number of a pizza delivery service, are also part of the brand and may consequently also function as important sources of brand equity.

2.2 Three questions on the conceptualization of brand equity

In conceptualizing "brand equity", the following three questions need to be addressed: 1. Which sources of brand equity should be considered? First, we need to differentiate between customer-based and company-based brand equity. Customer-based brand equity is admittedly the most important, but not the only source of the value a brand has for the company (Fig. 1). Apart from the sales market, a brand may also yield substantial benefits on other markets. Firms whose names are identified with a wellknown and popular brand have a great advantage on the labor market. Other advantages may be achieved • on the capital markets, • on other factor markets (e.g., when a firm is granted special purchasing conditions as a "reference customer" on account of its well-known brand name) or • in dealings with political decision makers.

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Figure 1: Sources of company-based brand equity

The present paper focuses on • Customer-based brand equity. For the purpose of our paper, we identify brand equity as the value the brand adds to a good or service for the final consumer. Without doubt, the trade plays an important role in the building of brand equity (e.g., Keller 1998; Riedel 1996; Srivastava and Shocker 1991). In some cases, it may even become the only source of brand equity, if the final consumers do not have any brand preferences. However, brand equity derived from the trade will not be discussed in this paper. • The brand value that is generated by the products presently on the market (current brand equity). We will not consider the potential value of a brand when the latter is extended to new products (e.g., D. Aaker 1992a; Keller 1993, 1998; Keller and Aaker 1992; Mayerhofer 1995; Mazanec and Schweiger 1981; Park and Srinivasan 1994; Smith and Park 1992). The proposed model may however also be used to predict this form of "latent brand equity". We shall further limit our discussion to explaining such brand equity as

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• results from the purchase decision itself (in-purchase brand equity). Without any doubt, advantages for strong brands may also exist in a pre- and post-purchase setting. One wellknown example for this phenomenon is the post-purchase reduction of cognitive dissonance which may be supported by a strong brand. 2. What units should be used to measure brand equity? The concepts for measuring customer-based brand equity currently available differ from each other in that they • evaluate it primarily in non-monetary terms using such criteria as brand recall and recognition, sympathy for a brand or quality assessment, and subsequently establish an index value from which they derive a financial value for the company (e.g., D. Aaker 1992a, p. 43ff; Andresen 1991; Bekmeier-Feuerhahn 1996; Kapferer 1996) or • quantify it in monetary terms from a customer´s perspective (e.g., Bello and Holbrook 1995; Brosch 1995; Crimmins 1992; Herp 1982; Kaas 1977; Kamakura and Russel 1993; Park and Srinivasan 1994; Sander 1994; Swait et al. 1993). As a rule, this approach is based on the consumer’s willingness to pay a price premium or on the higher price actually achieved by a given brand. In our view, two arguments speak in favor of a monetary quantification of customer-based brand equity: • Generally, the goal of business activity is to make a profit. Brand awareness, sympathy or quality assessment are merely control parameters whose contribution to profit generation becomes manifest only if the consumer is ready to pay a higher price. • The monetary quantification of customer-based brand equity forms the bridge via which the monetary value the brand has for the company can be assessed. This company-based value of a brand opens up new fields of application for the concept of brand equity. These include the possibility of asset valuation for the balance sheet or of determining license fees and sales value of the brand (cf. Barwise et al. 1989; Schweiger and Friederes 1995). Alternative approaches, such as deriving company-based equity from weighted indexes, 8

share prices, "production costs" or from the market price of a brand, are in our view either questionable from a methodical point of view or cannot be universally applied (cf. Kapferer 1996, p. 475ff). 3. Tangible or intangible brand equity? A widely discussed issue is whether brand equity also includes the objectively measurable advantages of a product ("tangible brand equity") or only the added value generated by the brand as such ("intangible brand equity"; cf. Berndt und Sander 1994; Blackston 1992; Farquhar and Ijiri 1993, p. 87; Kamakura and Russell 1993; Roeb 1994; Sander 1995). When regarding brand equity from a tangible perspective, for example, one might also rate as brand equity the value of an additional airbag offered by a specific automobile brand. The intangible view does not regard such a product advantage as part of brand equity. There is no general answer as to which of the two positions is the "right" one. Instead, it depends on the aim of brand evaluation whether objective product advantages should also be included in the concept of brand equity. To judge the performance of an advertising agency which has no influence on product design, for instance, an intangible definition of brand equity will be the method of choice. However, if we wish to determine the price for the sale of a brand complete with all production facilities and patents, a tangible view of brand equity may be the more appropriate approach. The present model aims to explain intangible brand equity. It may however also be extended to a tangible brand equity concept.

3 The building of brand equity: A proposed model involving four paths between input and output To explain the building of intangible monetary customer-based brand equity, we propose a model which can be divided into six sub-sectors. From the input variable sector, four paths lead to the output variable of brand equity (Fig. 2): • the informational path: the brand creates an informational value for the consumer by facilitating the purchase decision and reducing uncertainty;

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• the affective path: the brand gives the product an affective value via a variety of mechanisms; • the social path, on which the brand may become an instrument of social self-presentation; • the path via a change in the perception of product attributes.

Product Knowledge

Costs of Search and Thinking

Involvement

Perceived Risk

Risk Aversion

Cost-Benefit Ratio of Information Search and Processing

Ratio of Search, Experience, and Credence Qualities

Informational Value of the Brand

Brand-related Heuristic Rules

Price-Utility Function

Imagery and Acoustic Associations

Personal Experiences with the Brand

Symbolic Experiences with the Brand

Congruence with the Ideal Own Self

Intangible Monetary Customer-Based Brand Equity

Affective Value of the Brand

Brand Familiarity Social Value of the Brand Congruence with the Ideal Social Self

Conspicuousness of Consumption

Perceptual Changes

Figure 2: Proposed model explaining intangible monetary customer-based brand equity Note.- An arrow leading from variable A to variable B stands for a main effect of variable A on variable B. If this arrow is hit by another arrow starting from a variable C, this means that the effect of variable A on variable B is moderated by variable C. By way of analogy, this also applies to higher-order interactions.

To understand the model it is important to note

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• that it is a framework model. The different variables are not intended as directly applicable and unidimensional criteria. They need to be specified individually for each product group in actual practice. The only parameter that is uniform and comparable across product categories on account of its monetary quantification is "intangible monetary customerbased brand equity". • that it conceptionally addresses the generation of brand equity for a specific consumer in a specific purchasing situation. In an empirical setting, it will be necessary to aggregate the observations of different consumers - possibly subdivided into different consumer segments. • that those variables which relate to product attributes represent the conglomerate of a multi-attribute model. The variable of "perceptual changes", for instance, is to be understood as the sum of brand-based perceptual changes across product attributes weighted according to the importance of the various attributes (Park and Srinivasan 1994). If we wish to simulate the model for a given product range, we first need to identify the relevant product attributes for the consumers or for specific groups of consumers. The same is true for the field of social and affective dimensions. Likewise, the variable of "congruence with the ideal own self" is also to be seen as the sum of dimensions emanating from the brand personality in question (e.g., successful, youthful, serious-minded, etc.). • that the model serves as an explanation of the relative value of the brand. The different variables are, for the sake of comprehension, defined in absolute terms (e.g., "informational value of the brand"), although in their practical application, they are always meant to be seen in comparison to some other brand (i.e. as a lower or higher informational value of brand A as compared to brand B). Interesting practical yardsticks for a firm’s own brand may be its most important competitor, a store brand or a completely unknown brand.

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3.1 The input variables These variables are not to be understood as actual input variables on the part of the company but rather as the first psychological representation of such input variables. Other input variables come from the consumer and the product side. Together they are the starting point for those paths which lead to the generation of brand equity.

Product Knowledge

Costs of Search and Thinking

Involvement

Perceived Risk

Risk Aversion

Cost-Benefit Ratio of Information Search and Processing

Ratio of Search, Experience, and Credence Qualities

Informational Value of the Brand

Brand-related Heuristic Rules

Price-Utility Function

Imagery and Acoustic Associations

Personal Experiences with the Brand

Symbolic Experiences with the Brand

Congruence with the Ideal Own Self

Intangible Monetary Customer-Based Brand Equity

Affective Value of the Brand

Brand Familiarity Social Value of the Brand Congruence with the Ideal Social Self

Conspicuousness of Consumption

Perceptual Changes

Figure 3: The input variables of the model

The input variables are prefixed for a specific point in time, i.e. for a given purchase decision. In our view, ten such variables are of special importance for the building of brand equity (Fig. 3). 12

The consumer's personal experiences with a brand may relate to ownership and driving in the case of a car, tasting in regard to a food product, and the handling of business by a given bank in connection with a loan. A visit to a branch store of a furniture outlet chain may also be seen as such a type of personal brand experience. The important thing is that these are all direct, personal experiences with a given brand. As regards brands under the name of which various products are marketed, it will be necessary in each case to determine which experiences the customer transfers from one product to another (cf. Aaker and Keller 1990). As against that, symbolic experiences with a brand are largely the result of indirect observations and may also take different forms. A few examples for such symbolic experiences include making contacts with brand advertising, participating in a sponsored event, observing a specific type of brand user or just simply obtaining word-of-mouth information from friends and neighbors. Differentiating between indirect (symbolic) and direct (personal) experiences can at times be quite difficult, but may nevertheless be a useful approach since direct experiences have a stronger impact on the customer´s judgment (cf. Fazio 1990; Fazio et al. 1982; Keller 1993; Wright and Lynch 1995). In advertising, by contrast, it is necessary to overcome the barrier between the customer's attitude toward the ad and his or her attitude toward the brand (e.g., Chattopadhyay and Nedungadi 1992; Derbaix 1995; MacKenzie and Spreng 1992; cf. Keller 1987, 1991, 1998). Product knowledge - in contrast to personal and symbolic experiences with a specific brand refers to the consumer’s general knowledge about the product and the purchase decision, and acts as a separate storage (e.g., Johar, Jedidi, and Jacoby 1997; Punj and Staelin 1983; Urbany, Dickson, and Wilkie 1989). It contains, for instance, the knowledge as to which items of product information should be observed, where they are available from, how they may be merged into specific expectancy value components, and how important such expectancy value components are for the consumer (cf. Dabholkar 1994). Taking the automobile as an example, one might say that the HP information provided in the catalog is an important determining factor of acceleration and that acceleration is of great importance for consumer X, who is a sporty driver. By perceived risk we mean the initial uncertainty which brand to choose (Urbany, Dickson, and Wilkie 1989). "Initial" refers to a hypothetical state prior to any internal information uptake from memory or any external search for information from catalogs, dealers, labels and 13

the like. It results from the uncertainty as to how specific product attributes should be rated (Dowling and Staelin 1994). Since the model, as mentioned above, reflects a comparison between two brands (e.g., the firm´s own brand with a trademark), this uncertainty about a given attribute may occur in either of the two brands. What is also to some extent predetermined by the product is the conspicuousness of consumption (cf. Bearden and Etzel 1982; Graeff 1996). One should not speak of a "general" conspicuousness of consumption, though, for it must always be considered very closely in what situations and for what peer group of a certain consumer segment the product becomes conspicuous - or is intentionally made conspicuous by the consumer. General brand-related heuristic rules are acquired in the course of a lifetime and appear to be viewed as either valid or invalid for larger product categories by the consumer (cf. Lichtenstein and Burton 1989). This is not about a particular brand but rather about general rules of thumb like "With a well-known brand nothing much can go wrong". While such general attitudes toward branded products are frequently studied by non-academic researchers (e.g., Grimm 1995a and 1995b; Kaplitza 1997), the academic research focus is more on heuristic approaches aiming at the price (e.g., "the more expensive a product, the better its quality", e.g., Lichtenstein and Burton 1989; Mitra 1995; Olshavsky, Aylesworth and Kempf 1995; Rao and Monroe 1988, 1989) or other extrinsic cues like the type of business (e.g., "smaller dealers offer better service", cf. Duncan and Olshavsky 1982). Academic investigations on brand-related heuristic rules are comparatively rare. Hoyer and Brown (1990) showed that a simple choice heuristic like "Buy the best-known brand!" primarily influences the decision of those consumers who have little experience with a given product category. As regards the advertising of a brand, the sheer size of an ad is typically interpreted as a sign of quality by consumers (Kirmani 1990; Kirmani and Zeithaml 1993). There is a number of ways to define involvement by differentiating according to the sources of involvement (e.g., Celsi and Olson 1988, Kroeber-Riel 1992) or the underlying motives (e.g., Johnson and Eagly 1989, 1990; Laurent and Kapferer 1985). For the purpose of the present paper, we wish to see involvement as a unidimensional parameter in the sense of a relative importance of the decision. It is irrelevant in this context whether this importance is an enduring or only a situational one since the model tries to give a conceptional explanation

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for a specific purchase decision. "Relative" means that the importance for the consumer can only be derived from a comparison with alternative objectives. One of these alternative objectives relates to the saving of costs of search and thinking (e.g., Punj and Staelin 1983; Schmidt and Spreng 1996; Shugan 1980; Srinivasan and Ratchford 1991; Urbany, Dickson, and Kalapurakal 1996). It must be noted that the procurement of external information on some products is quite cheap while it is rather expensive in regard to others. Thus, for example, it is clearly more costly to visit a car dealer than to turn a jar of marmelade upside down in order to know its ingredients. Apart from such lasting differences among products, there are also some situative influences which determine the weight of the costs of search and thinking. Time pressure, for instance, may considerably heighten the perceived costs of information activity (e.g., Beatty and Smith 1987; Urbany, Dickson, and Kalapurakal 1996). Conversely, the pleasure of shopping itself or of social benefits derived from passing on an information to friends and neighbors may reduce the costs of information activities. The decision whether such an activity pays off will ultimately be subject to a comparison with the importance of the decision. In this regard, it must be remembered that the search costs for a specific information are not necessarily the same for all brands. With the help of an efficient supply of information, a given brand may distinguish itself from the others in a given product category. Overall, search costs are a case of opportunity costs and are thus an "entry gate" for external objectives competing for time and effort with the purchase decision under examination. A second, more general "entry gate" for external opportunity costs is the price-utility function. This means that a decision must be taken among competing uses of scarce financial means in the sense of a microeconomic maximization of utility. One important determinant for the degree of scarcity of funds is the consumer's personal disposable income. The added value created by the brand must be weighed against an alternative use of funds before it can be translated into a willingness to pay a price premium for the brand. Even where a specific car brand is valued markedly higher by the consumer, he or she must still decide on how much money to spend on it if this means that the extra expenditure must be taken from the vacation budget (cf. e. g., Heath and Soll 1996). It is thus necessary to include this external variable in order to explain the consumer´s willingness to pay a price premium measured in absolute terms. What is important, though, is not just to consider the consumer's propensity to spend more for a presumedly higher product quality, but all other possible sources of brand 15

equity as well. Someone with a higher income, for example, will also be ready to pay more in order to avoid lengthy searches. The price-utility function is the end result of an important and complex process of search and interpretation of price information (e.g., Bonini and Rumiati 1996; Dickson and Sawyer 1990; Hay 1987; Zeithaml 1988). From the wide effects underlying the price-utility function, two should be considered more closely: • Price knowledge: It is often the case with frequently purchased low-involvement products that the absolute price is not checked at every purchase. The consumer's price knowledge in such cases is often rather limited and mostly based on earlier price research or on an image-based assessment of the price of a brand (e.g., Biswas and Sherell 1993; Dickson and Sawyer 1990; Diller 1985; Gijsbrechts 1993). Poor price knowledge may indeed give a brand more room for maneuvre in terms of pricing as well as a chance to make some shortterm profits, which, however, do not correspond to the customers' actual willingness to accept a higher price. In the long run, though, this can only be a "time window" with the consumer reconsidering his or her decision at regular intervals. • Heuristic price effects: As has been confirmed by numerous studies, consumers in certain situations tend to decide on the basis of a price-quality heuristic scheme: A higher price stands for a better quality (e.g., Lichtenstein and Burton 1989; Mitra 1995; Olshavsky, Aylesworth and Kempf 1995). Similarly, a higher price may also lead to a greater propensity to spend if the purchase of an expensive commodity is to produce a prestigeraising effect (e.g., Veblen 1973/1899). Such effects of a higher price are only attributable to brand equity if they are the result of an interaction with brand awareness, quality assessment or tradition. If no such interaction is necessary, we feel that these effects do not represent brand equity as they might just as well be achieved with an unknown brand by simply charging a higher price. Risk aversion, finally, relates to a general personality trait addressing the inclination of a person to take a certain risk once it has been perceived (e.g., Panne 1977; Sorrentino and Short, 1986).

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These ten input variables subsequently determine the paths on which a brand may be able to create customer-based brand equity.

3.2 The informational path to brand equity This path appears to be widely underrated or at least not consciously included in the considerations of brand managers in everyday practice. Generally, brand managers tend to possess a rather detailed knowledge both on their product and on the strong and weak points of the other brands on the market. They therefore risk to overestimate the knowledge and interest of the consumers. Being "cognitive misers", consumers do not like thinking (e.g., Alba and Hutchinson 1987; Garbarino and Edell 1997; Hauser and Wernerfelt 1990; Park and Hastak 1994; Shugan 1980) and shun the need for information search (e.g., Dowling and Staelin 1994; Punj and Staelin 1983; Schmidt and Spreng 1996; Srinivasan and Ratchford 1991). If they feel in any given phase of the purchase decision process that they have already invested too much energy, they will make up for it at some other stage (Coupey 1994). If a buyer is not sure which brand to choose, he or she is confronted with a specific costbenefit ratio of information activity in function of his or her product knowledge, level of involvement and costs of search and thinking (Fig. 4). The higher the level of involvement and product knowledge, the greater will be the benefit derived by the consumer from searching and cognitive activities. Together they determine whether it makes sense for the consumer to invest the time and effort required, i.e. the necessary costs of search and thinking, in the current choice of brand. As an alternative to the procurement of new information, the consumer may also choose to rely on already acquired knowledge. He or she will therefore always employ a specific mix of new information and previously acquired knowledge (e.g., Dick, Chakravarti, and Biehal; Johar, Jedidi, and Jacoby 1997; Lynch, Marmorstein, and Weigold 1988; Park and Hastak 1994). Personal and symbolic experiences with a brand may as current knowledge help reduce the cost of information procurement. In the most simple case, the effect is that a brand that enters more easily into the mind stands a better chance of being admitted into the consideration set of eligible brands (e.g., D. Aaker 1992a, 1992b; Farquar 1989, p. 27; Kardes et al. 1993; Keller 1993; Kroeber-Riel 1992; Teas and Grapentine 1996; cf. Feldman and Lynch 1988).

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Product Knowledge

Costs of Search and Thinking

Involvement

Perceived Risk

Risk Aversion

Cost-Benefit Ratio of Information Search and Processing

Ratio of Search, Experience, and Credence Qualities

Informational Value of the Brand

Brand-related Heuristic Rules

Price-Utility Function

Imagery and Acoustic Associations

Personal Experiences with the Brand

Symbolic Experiences with the Brand

Congruence with the Ideal Own Self

Intangible Monetary Customer-Based Brand Equity

Affective Value of the Brand

Brand Familiarity Social Value of the Brand Congruence with the Ideal Social Self

Conspicuousness of Consumption

Perceptual Changes

Figure 4: The informational path to brand equity

In a later, more detailed brand evaluation, the advantages derived from personal and symbolic experiences differ according to the type of relevant product attributes (e.g., Kaas 1990; Rao and Bergen 1992; Swait et al. 1993; Teas and Grapentine 1996; for brand extensions, see Smith and Park 1992). The ratio of search, experience and credence qualities is an influencing factor which is to some extent predetermined by the product (Nelson 1974). It nevertheless implies a psychological dimension which may vary from person to person. The question is whether relevant product attributes may be evaluated already before purchase (search qualities), only after purchase and use (experience qualities) or not at all (credence qualities). For example, while the attribute "four-door automobile" can easily be verified prior to purchase, the attribute of longevity can only be assessed after the car has been used. The attribute of passive safety, finally, will remain a credence quality for most drivers. Experience and credence qualities constitute a particularly great potential for brand equity. The distinctions between these variables must however be made specifically for each consumer or consumer segment and will depend on their level of product knowledge. Whereas the quality 18

of wine is an experience quality for the wine connoisseur, it more likely is a credence quality for an amateur consumer. Personal experiences with a brand may bring advantages in search and experience qualities when compared to untested brands. In terms of search qualities, the consumer simply saves the need for searching (e.g., Teas and Grapentine 1996). The consumer knows from experience whether a brand possesses a specific search attribute or not. This is a type of information one would first have to obtain about some other brand. Experience qualities, by definition, cannot be assessed until after a given product has been used. In the case of a still untested brand, such experience qualities are uncertain. How high the cost of reducing such uncertainty actually is will differ from product to product. It is fairly simple and inexpensive to assess the taste of food products by making a trial purchase. However, when the quality of an authorized auto repair shop is evaluated, it will be a considerable competitive advantage for a car brand if the customer has had positive experiences with his or her last car. Symbolic experiences with a brand may be used for all three types of product attributes search, experience and credence qualities. In the case of search qualities, symbolic experiences offer the consumer a comparable degree of certainty as personal experiences. Informative advertising may thus help the consumer compensate for search costs with high credibility (e.g., Darley und Smith 1993; Ford, Smith, and Swazy 1990). As the information that a car is equipped with an additional airbag can easily be verified, the consumer harbors no doubt about the credibility of the claim. The situation is different in the case of experience qualities. The claim that a new brand of orange juice tastes particularly good or that a detergent washes better than others requires high credibility on the part of the advertiser in order for the claim to be able to compete with personal experiences. It may therefore be assumed that symbolic experiences in this respect will offer less certain information than personal experiences. On the other hand, the consumer still possesses more information than in the case of a brand with which he or she associates neither personal nor symbolic experiences. When it comes to credence qualities like the aquaplaning safety of auto tires, the naturalness of food products, the correctness of billing by a car repair shop or the hygienic preparation of dishes in a fast-food restaurant, symbolic experiences are without competition. Overall, the informational value of a brand results from an iterative process (cf. Jacoby et al. 1994). In several sub-decisions, the consumers make up their minds whether to obtain more 19

information or to rely on their personal and symbolic experiences. Eventually, even after an exhaustive information process for an unknown brand, two advantages may be left to a brand with which strong personal or symbolic experiences are associated: • While there is usually an overall attitude of sufficient certainty for a personally known brand (e.g., Dabholkar 1994; Sanbonmatsu and Fazio 1990; cf. Park and Hastak 1994), the items of information about the new brand would first need to be integrated into an overall attitude toward the brand in a more or less costly procedure. The consumer’s reluctance to bear these costs may, especially in a low-involvement setting, mean that he or she will ultimately end up buying the known brand again. • In terms of experience qualities, some residual uncertainty remains for a brand which the consumer has not personally tested before. In regard to credence qualities, a brand which conveys credible symbolic experiences to the consumer will reduce the customer´s risk as compared to the unknown brand. The greater level of uncertainty will in both cases lead to a discounting of the competitor brand (e.g., Jaccard and Wood 1988; Johnson and Levin 1985). The size of this discounting factor, and thus the informational value of the known brand, will depend on the consumer´s risk aversion. If the cost-benefit ratio of an information activity is very unfavorable, decisions will be rather superficial (cf. ELM, e.g., Petty and Cacioppo 1986a, 1986b; Petty, Cacioppo, and Schumann 1983; or HSM, e.g., Chaiken 1980; Chaiken, Liberman, and Eagly 1989). In such a case, general rules of thumb of the sort "With a well-known brand, nothing much can go wrong" may also play a role in reducing uncertainty (cf. Hoyer und Brown 1990).

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3.3 The affective path to brand equity Several mechanisms may lead to an affective value of the brand (Fig. 5). Apart from the • direct effect of symbolic experiences the affective path may pass through three intermediate stages: • familiarity with the brand, • self-congruence, and • imagery and acoustic associations which, in the form of "advertising remains" or as a result of personal experiences, have become autonomous units in a separate storage modality.

Product Knowledge

Costs of Search and Thinking

Involvement

Perceived Risk

Risk Aversion

Cost-Benefit Ratio of Information Search and Processing

Ratio of Search, Experience, and Credence Qualities

Informational Value of the Brand

Brand-related Heuristic Rules

Price-Utility Function

Imagery and Acoustic Associations

Personal Experiences with the Brand

Symbolic Experiences with the Brand

Congruence with the Ideal Own Self

Intangible Monetary Customer-Based Brand Equity

Affective Value of the Brand

Brand Familiarity Social Value of the Brand Congruence with the Ideal Social Self

Conspicuousness of Consumption

Perceptual Changes

Figure 5: The affective path to brand equity 21

A direct effect, above all of symbolic experiences, may be inferred from the theory of classical conditioning (e.g., Ghazizadeh 1987; Gorn 1982; Kroeber-Riel 1992, p. 128ff). An affective value can arise from the emotional effects of an advertising contact, participation in an event, or encounters with friendly personnel. While this is somewhat contested in the psychological literature, the current view is that there may indeed be a direct effect (c.f. Eagly and Chaiken 1993, p. 410ff). Affective elements can thus be transferred onto the consumer's attitude towards a brand without intermediate steps or cognitive participation. Symbolic and personal experiences may however exert their emotional effect via a discernible intermediate step. One such phenomenon is the growth of familiarity with the brand. The explanation for this phenomenon lies in the "mere-exposure effect". This effect ensures that the simple fact of repeated exposure to an object endows the object with a positive affect (e.g., Janiszewski 1988, 1990, 1993; Zajonc 1980; Zajonc and Markus 1982). At present, it is not fully understood whether this positive affect can occur independently of cognitive effects (e.g., Anand and Holbrook 1990; Anand, Holbrook, and Stephens 1988; Eagly and Chaiken 1993, p. 412ff; Heath 1990; Zajonc 1980). The existence of such an affect is however beyond doubt. Another possibility of how a positive affect for a brand can be created by personal and, above all, symbolic experiences, can be found in the congruence of brand perception and selfimage. This concept is frequently discussed under the heading of brand personality (e.g., D. Aaker 1996; J. Aaker 1997; Keller 1998). The underlying mechanism of this effect is that of self-completion (e.g., Gollwitzer and Wicklund 1985). The consumer usually possesses a differentiated image of him- or herself. This image is composed of the consumer´s notion of who he or she actually is (the "actual own self") and of an ideal image of who he or she would like to be (the "ideal own self"; e.g., Higgins 1987, 1989; Ross 1971; Sirgy 1982, 1985; Sirgy and Samli 1985; Sirgy et al. 1997; Staudinger and Greve 1997). At the same time, the consumer also forms an image of some of the brand's "personality traits" such as sincerity, sophistication or ruggedness (J. Aaker 1997). Congruence between such a "brand personality" and important aspects of the consumer's own self-image results in a positive assessment of the brand (e.g., Batra, Lehmann, and Singh 1993; Dolich 1969; Graeff 1996; Landon 1974; Malhotra 1988; Ross 1971; Sentis and Markus 1986; Sirgy 1985; Sirgy and Danes 1982; Sirgy et al. 1997). Even though it is not yet clear whether the brand must primarily

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correspond to the image the customers actually have of themselves or rather to the image of who they ideally want to be, it seems to be a plausible assumption that • the brand personality must in the first place correspond to the ideal own self without • deviating too far from an actual own self that is perceived as highly certain. Otherwise, the cognitive costs for an upgrading of the own self-image by the purchase or possession of the brand become too high. The possibility of self-completion through a brand seems to apply especially when there is a great discrepancy between the actual and the ideal own self and when the perception of the actual own self is rather blurred (cf. Bem 1972; Fazio 1987). Thus, the purchase of a brand of car with a particularly youthful appeal - to the extent that it is directed towards the target person "own self" - will only be interesting in a phase in which unequivocal indications such as inner feelings or direct tests send out ambivalent signals (as would be the case in a traditional midlife-crisis setting). For persons who, on the basis of such unequivocal indications, can be sure that they are still young, such a purchase is as unlikely to lead to a change of self-image as it is for persons who, as a result of their inner feelings and direct tests, have no more leeway for a change of their self-image. Frequently, the self-congruence effect that is directed to the customer´s own personality is seen as interchangeable with social value. This is due to the fact that it may be important for the customer´s own self-esteem how he or she is seen by significant others (e.g., Markus and Wurf 1987; Tice 1992; Wiswede 1973). In that way, the conspicuousness of the purchase and possession of a brand may contribute indirectly to an improvement of the own self-perception. Insofar as the aim of the purchase is to improve one's own self-image by enhancing the image others have of oneself, it should be ascribed to the affective value of the brand through selfcompletion rather than to a social value. A special function in the generation of affective value is played by elements of the brand scheme stored as imagery and acoustic associations (e.g., Kroeber-Riel 1992, 1993; Ruge 1988; Tauchnitz 1990). They may be "advertising remains" in the form of stored images and acoustic associations (e.g., Bone and Ellen 1992). Another source is personal experience with a specific brand (e.g., the image of the own Sony TV set). Their special character results from

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the separate modality in which they are stored (cf. Paivio 1979). In terms of affective content, they may have a three-fold effect: • They continue the process of emotional conditioning: As a result of intentional and unintentional recall of affect-laden imagery or acoustic associations, there may be a constant recharging of the brand with emotional contents (cf. Dadds et al. 1997). • They are decoded as an indication of self-congruence (cf. Bone and Ellen 1992). • They are seen by some researchers as exerting a direct effect on the consumer's attitude and behavior (e.g., Bekmeier-Feuerhahn 1996; Kroeber-Riel 1993, p. 110ff). Relationships between affective variables and other areas Affective and cognitive elements of a brand are not independent of each other. The affective evaluation of a brand may blur the view for an objective cognitive assessment (e.g., Johnson and Eagly 1989, 1990; Petty and Cacioppo 1986a, 1986b). This has an impact on the informational value of a brand and on perceptual changes. A positive affective evaluation of a brand will be associated with more certainty of assessment or with an overall improvement of perception of product attributes. In this regard, Sirgy and colleagues (Sirgy and Samli 1985; Sirgy et al. 1991) were able to prove that the product attributes of a brand which corresponds to one´s own self-image is perceived with a positive bias. Imagery and acoustic associations do not only exert an affective influence but frequently also contain quite specific information on the product. Whether affective or cognitive elements are retrieved from imagery and acoustic associations appears to depend on the customer´s involvement in a given situation (e.g., Miniard et al. 1991). Under low involvement, images are decoded with regard to their affective content while high involvement causes them to be examined for their product information potential. It appears to be quite likely that, outside the purchase decision, imagery and acoustic associations resulting from advertising initially exert an affective influence whereas in the purchasing situation - especially when the decision is taken in a high-involvement setting - they serve as a basis for information procurement (cf. Costley and Brucks 1992; Edell and Staelin 1983; concerning the effect of involvement changes, see Park and Hastak 1994). 24

3.4 The social path to brand equity

Product Knowledge

Costs of Search and Thinking

Involvement

Perceived Risk

Risk Aversion

Cost-Benefit Ratio of Information Search and Processing

Ratio of Search, Experience, and Credence Qualities

Informational Value of the Brand

Brand-related Heuristic Rules

Price-Utility Function

Imagery and Acoustic Associations

Personal Experiences with the Brand

Symbolic Experiences with the Brand

Congruence with the Ideal Own Self

Intangible Monetary Customer-Based Brand Equity

Affective Value of the Brand

Brand Familiarity Social Value of the Brand Congruence with the Ideal Social Self

Conspicuousness of Consumption

Perceptual Changes

Figure 6: The social path to brand equity

The mechanisms able to give a brand a social value for the consumer are basically quite similar to those affective mechanisms which stand behind the effect of the congruence of a brand with the customer´s own ideal self (Fig. 6) The most important differences are: • A different "target segment" and thus different motives. In the concept of congruence of a brand with the perception of the customer´s ideal own self, the aim is to raise his or her own self-esteem. In terms of social value, the consumer's aim is to improve the image that significant others (individuals or groups) presumedly have of him or her (cf. Vershofen 1959). As a rule, there are several target segments. If you take a car, these target segments 25

may be fellow workers, neighbors, friends or even members of the own family. As selfcompletion and thereby the elevation of one’s own self-esteem can also take place indirectly via self-presentation vis-à-vis such peer groups, affective and social values may best be distinguished by the underlying motives. Whereas the issue in affective value is about preserving or improving the consumer’s self-esteem, it is his or her wish in social value to have social relationships or to influence people possessing important resources (e.g., business partners) which is the underlying reason for a decision in favor of a specific brand. • Conspicuousness of consumption is a must here since without it consumers may be able to improve their own self-perception but not the way in which they are judged by others (cf. Bearden and Etzel 1982). However, there are several ways to raise the conspicuousness of a product (e.g., "accidental" conversations about a decision in favor of a specific store chain, test drives with a new car with persons from the target segment, frequent invitations of guests after the purchase of new furniture, etc.). Social and affective values are often closely related. For instance, the purchase of a car usually serves both purposes. The valuation of a social benefit is more difficult for the consumer, though, because he or she, in contrast to an affective benefit due to an improvement of self-esteem, is facing not only one, but several target segments. For each of these persons or groups of persons, there may be a specific ideal social self which the consumer may wish to achieve. This is particularly true for consumers who take a strong interest in how they are perceived by their peer groups (e.g., Batra, Myers, and D. Aaker 1995, p. 328; Graeff 1996; cf. Schiefele 1990; Snyder 1974; Tunnell 1984). If there is a strong divergence of objectives among these target segments (e.g., a car in business life must convey respectability while in private life the owner may wish to communicate an image of sportiness) the consumer will have to make a decision for one or the other or else choose a compromise brand. In the case of less expensive products such as cigarettes, the consumer will opt for a "multi-brand strategy" designed for a variety of occasions and target segments.

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3.5 The path of perceptual changes

Product Knowledge

Costs of Search and Thinking

Involvement

Perceived Risk

Risk Aversion

Cost-Benefit Ratio of Information Search and Processing

Ratio of Search, Experience, and Credence Qualities

Informational Value of the Brand

Brand-related Heuristic Rules

Price-Utility Function

Imagery and Acoustic Associations

Personal Experiences with the Brand

Symbolic Experiences with the Brand

Congruence with the Ideal Own Self

Intangible Monetary Customer-Based Brand Equity

Affective Value of the Brand

Brand Familiarity Social Value of the Brand Congruence with the Ideal Social Self

Conspicuousness of Consumption

Perceptual Changes

Figure 7: The path of perceptual changes

From an intangible view of brand equity, only that part of brand preference is counted towards brand equity which is not due to a technical, objectively measurable product superiority (e.g., Park and Srinivasan 1994). The common element of the informational value of a brand and of perceptual changes is that both are related to concrete product attributes. The difference is - statistically speaking - that it is in one case the variance and in the other the mean of the valuation of product attributes which are examined. In substantive terms, the informational value of a brand is related to the dimension "certain versus uncertain" while perceptual changes concern the dimension "good versus bad". These two dimensions may, but do not necessarily have to, coincide. If, for instance, two competing brands in a food category 27

enjoy an excellent reputation, the consumer may well regard it as likely that they both taste good. Consumers who have already tried one of them, and not the other, will know that one of the two brands tastes good, while they will only have a more or less certain assumption that the other probably tastes good. Another difference lies in the fact that the informational value of a brand can result from all types of product qualities (e.g., including search qualities) whereas perceptual changes are only generated by experience and credence qualities (Fig. 7). The older German school of psychology has coined the term "irradiation" for these perceptual changes (e. g., Spiegel 1958). Such irradiations were above all predicted and detected for product attributes which were not "experienced on the thematic level" (for an overview, see Schweiger and Schrattenecker 1995, p. 147ff). In a similar way, more recent approaches such as the heuristic-systematic model postulate brand-based perceptual changes above all for "ambivalent" product qualities (e.g., Chaiken and Maheswaran 1994; Eagly and Chaiken 1993; Maheswaran, Mackie, and Chaiken 1992) like the design of a car, the sound quality of a hifi system or the taste of a soft drink. Both schools of thought refer to the field of peripheral or heuristic information processing. However, perceptual changes may also occur due to conscious inferences in a central information processing setting (e.g., Dick, Chakravarti, and Biehal 1990; Ford and Smith 1987). As with the informational value of a brand, two approaches for irradiations and conscious inferences may also be considered here: • the individual image of a brand, which results from symbolic and personal experiences (e.g., food brand A claims in its advertising that it is more healthful and is thus also judged that way by the consumers) and • general brand heuristics (e.g., "food brand A is purchased more often, it must therefore taste better"). The advantage of an intangible view of brand equity lies in the fact that it permits a more precise attribution of performance within the company. What is an integral whole for the consumer is the result of a diversified cooperation between various departments within the company such as research and development, production and marketing. If a brand manager 28

does not have an influence on the first two phases, his achievement will be to have given the brand a value beyond the product as such. This is not meant as a way of cheating the consumer but of performing professional communication. Intangible brand equity due to perceptual changes may be created by: • Positioning a brand toward a subjective consumer experience ("experiential strategy", see Park, Jaworski, and MacInnis 1986): With the help of advertising and packaging design, amongst others, the consumer's subjective consumption experience can be enhanced without objectively measurable product superiority. Just think of the taste of champagne, the crispiness of savory biscuits or the refreshing action of a shower lotion. As there is no objective yardstick in such subjective consumer experiences, this will actually create an additional value for the consumer. • A superiority in the communication of actual product advantages: If marketers succeed in conveying the actual attributes of a brand to the consumer in a more credible fashion than their competitors, they build an intangible brand equity. The consumers do not rate that product as being better than it is, but they underrate the quality of the competitors' products. In that case, intangible brand equity is a sign of good brand management without making false advertising claims.

3.6 The output variable: Intangible monetary customer-based brand equity The output variable of this model, as mentioned above, is the willingness of the consumer to pay a higher price as the result of branding, i.e. the intangible monetary value of the brand for the consumer (Figure 8). This makes sense in that the performance of brand management consists in a choice of positioning which is translated into an additional profit for the company. In that sense, it would be of little use for a firm to try to persuade a target segment at great costs of the superiority of their own brand if consumers in that segment still need or want to invest their purchasing power in other areas.

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Product Knowledge

Costs of Search and Thinking

Involvement

Perceived Risk

Risk Aversion

Cost-Benefit Ratio of Information Search and Processing

Ratio of Search, Experience, and Credence Qualities

Informational Value of the Brand

Brand-related Heuristic Rules

Price-Utility Function

Imagery and Acoustic Associations

Personal Experiences with the Brand

Congruence with the Ideal Own Self

Intangible Monetary Customer-Based Brand Equity

Affective Value of the Brand

Brand Familiarity

Symbolic Experiences with the Brand

Social Value of the Brand Congruence with the Ideal Social Self

Conspicuousness of Consumption

Perceptual Changes

Figure 8: The outvariable intangible monetary customer-based brand equity

4 Summary and discussion The model presented in this paper attempts to give an integrative view of how customer-based brand equity may be generated. From the following input variables • personal experiences with the brand, • symbolic experiences with the brand, • perceived risk, • involvement, • product knowledge, • brand-related heuristic rules, • conspicuousness of consumption, 30

• costs of search and thinking, • risk aversion, and the • price-utility function four paths may lead to the output variable of intangible monetary customer-based brand equity: • the informational path, enabling the brand to reduce uncertainty and to save information costs, • the affective path, which directly or indirectly charges the brand with emotional substance, • the social path, which leads to an improvement of evaluation by significant others, and • the path of perceptual changes, which reflects a skilful communication of the advantages of the brand. One important prerequisite for the economic success of a brand is to address a target group which is ready to pay a higher price for these values. At present, the model is designed to serve as a basis for future discussion and empirical research. A major restriction results from it being a theoretical framework model. In such a model, the various elements can only be presented on a synoptic basis. Many of the above variables have been covered by a large number of publications which give a very detailed insight into the patterns of effect emanating from them. For the model to be applied in practice in a specific product category, it is also necessary, for instance, to specify forms of symbolic and personal experiences with a brand as well as important product attributes and relevant social reference groups. We nevertheless believe that the notion of multi-level and diverse relationships between the first psychological representation of marketing instruments and customer-based brand equity that is inherent in such a framework model may be helpful for a better understanding of the modes of action of the various control variables. One such practical example are routinely performed surveys of brand awareness by various methods. They are however only useful if the brand manager knows whether and on which paths brand awareness contributes to brand equity. Below are some examples of how diverse these paths may be (cf. Aaker 1992a, p. 85ff, 1992b; Keller 1998, p. 91f):

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• Brand awareness may be indispensible as the brand must be actively recalled by the consumer in order to qualify for his or her consideration set (e. g., Posavac, Sanbonmatsu, and Fazio 1997). • Via heuristic conclusions, brand awareness may help reduce uncertainty about important product attributes or improve perception in the face of ambivalent product attributes such as the design of a car, the taste of a cereal or the sound quality of a hifi system. • It may be an expression of familiarity with the brand and thus of an affective value for the consumer. • It may also be an indispensible prerequisite for the social value of a brand. For instance, the buyer of a TV set may well believe that unknown brands are just as good as known ones. With respect to the reactions from his friends, however, it might be rather disadvantageous for him to own an unknown brand of TV set. An understanding as to which of these paths brand awareness will take is an indispensible prerequisite for assessing its value and function in brand management. In conceptional terms, the model describes the building of customer-based brand equity for a single consumer in a given situation. As a result of this, the following extensions are possible: • The integration of situative customer-based brand equity into a measure of the value the customer represents for the company within a specified time period (e.g., one year). For this purpose, further explanatory variables must also be taken into account. It must be considered, for instance, how often the consumer buys a product, what chance he or she has to get in contact with the brand when switching between supermarket chains (e.g., Park and Srinivasan 1994; Riedel 1996) and how profoundly fluctuations in explanatory variables (e.g., because of mood-dependent price-utility functions) will lead to a behavior with or without brand loyalty (cf. e.g., D. Aaker 1992a, 1992b). In practice, such integration will not take place in the individual consumer but on the level of consumer segments.

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• The integration of brand equity of a single consumer or consumer segments into a company-based brand equity in monetary terms (e.g., Sander 1994, 1995). It must be considered, though, that customer-based brand equity at a uniform price cannot be fully exploited by the company. It will always be divided among the manufacturer, the consumers and the retailers. As consumers will differ in their willingness to pay a higher price, a price-sales curve is created on which the point of optimal profit needs to be determined (e.g., Kaas 1977). This means that some consumers will pay less than they would normally be ready to pay. As a function of the firm's market position, a smaller or larger portion of brand equity will go to the trade. In the absence of precise forecasts, such calculations might be difficult, depending on the time horizon of brand evaluation. Before these questions can be solved, the issue that needs to be addressed as a first step is to explain how brand equity is built in the customer´s mind. For the time being, the proposed model might above all be a heuristic instrument for the brand manager which can be used to mentally simulate the effect of marketing measures on customer-based brand equity.

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