575 word-of-mouth effect
favorable/unfavorable, or indifferent. Positive word-of-mouth communi-
cation can be viewed as the addition of a free flow of information which
augments the flow of information provided by advertising. Negative
word-of-mouth communication may take many forms including commu-
nication of unsatisfactory experiences or adverse rumors about a brand,
offering, firm, or industry.
KEY WORDS Verbal communication, informal communication
IMPLICATIONS
Knowledge of the type of information communicated via word of mouth
is often considered important to marketers since, for many products
and services, negative word-of-mouth communication is more common
than positive communication. In addition, since unfavorable information
tends to carry more weight than favorable information among prospec-
tive consumers for many products and services, marketing managers
should strive to actively monitor as well as influence both the type and
level of word-of-mouth communication.
APPLICATION AREAS AND FURTHER READINGS
Services Marketing
Mangold, W. G., Miller, F., and Brockway, G. R. (1999). ‘Word-of-Mouth Communi-
cation in the Service Marketplace,’ Journal of Services Marketing, 13(1), 73–89.
Harrison-Walker, L. Jean (2001). ‘The Measurement of Word-of-Mouth Communi-
cation and an Investigation of Service Quality and Customer Commitment as
Potential Antecedents,’ Journal of Service Research, 4(1), 60–75.
Marketing Research
Godes, D., and Mayzlin, D. (2004). ‘Using Online Conversations to Study Word-of-
Mouth Communication,’ Marketing Science, 23(4), 545–560.
BIBLIOGRAPHY
Ellison, G., and Fudenberg, D. (1995). ‘Word-of-Mouth Communication and Social
Learning,’ Quarterly Journal of Economics, 110, 93–126.
Engel, James F., Kegerreis, Robert J., and Blackwell, Roger D. (1969). ‘Word-of-
Mouth Communication by the Innovator,’ Journal of Marketing, 33(3), July, 15–19.
word-of-mouth effect
DESCRIPTION
Any effect resulting from word-of-mouth communication among consumers.
KEY INSIGHTS
The effects of word-of-mouth communication may be positive, negative,
or neutral depending on its magnitude and content. The effects may also
be limited to a particular brand, product, service, promotion, or firm but
may also encompass entire industries or markets. The strategic impor-
tance of word-of-mouth communication effects may also vary, where,
for some firms and some products (e.g. a local manufacturer of a new
popcorn snack), its positive effect is counted upon as the sole means to
spread awareness and interest in the product, while for other firms and
products (e.g. Coca-Cola) its positive effect may be dwarfed by ongoing
advertising by the firm.