Selling information that is later used in decision making constitutes
an increasingly important business in modern economies (Jensen 1991).
Information is sold under a large variety of forms: industry reports,
consulting services, database access, and/or professional opinions giv
en by medical, engineering, accounting/financial, and legal profession
als, among others. This paper is the first attempt in marketing to stu
dy competition in the rapidly emerging information sector. Specificall
y, we are interested in answering the following questions: (1) Is comp
etition fundamentally different when competing firms sell information
rather than traditional goods and services, and-if yes-why? (2) What a
re the implications of such differences for decision makers (marketers
and regulators)? (3) Can we explain some of the observed marketing st
rategies in the information industry? As such, the audience of the pap
er includes academics as well as professionals who are interested in u
nderstanding what is specific about competition in information markets
. Familiarity with the practical implications of such differences and
understanding of the mechanisms that drive them is essential for those
who are faced with the problem of marketing information. To answer th
e above research questions we build a simple game-theoretic model that
consists of two firms selling information to a population of consumer
s who are heterogeneous in their willingness to pay for the quality of
information. The most important features of the model are the followi
ng. Information products sold by the two firms are modeled as random d
raws from two normal distributions having equal mean. The variances of
these distributions and their correlatedness constitute the product-a
ttribute space, which is assumed to be common knowledge. Consumers are
interested in assessing the mean of the distributions and to do so th
ey can buy the sample from any of the firms or they can buy both sampl
es and combine them to obtain a more accurate estimate. Quality of inf
ormation is linked to the accuracy of consumers' estimate of the mean
which in turn is influenced by the accuracy of each sample as well as
by their correlatedness. Consumers' utility depends on the quality of
information they purchased, on their inherent utility for quality (tas
te), and on the total price they paid to acquire information. Knowing
consumer preferences, firms simultaneously price their information pro
ducts. The main finding of the paper is that information markets face
unique competitive structures. In particular, the qualitative nature o
f competition changes depending on basic product characteristics. Whil
e traditional products and services compete either as substitutes or a
s complements in the relevant product-attribute space, information may
be one or the other, depending on its position within the same produc
t-attribute space. Said differently, the nature of competition changes
qualitatively with a continuous change in basic product-attribute lev
els. The intuition behind this finding is the following. When purchasi
ng information, consumers facing important decisions may find it benef
icial to purchase from several information sellers. This is more likel
y to happen when the reliability of information is low and the sources
of information are independent. Under such conditions information pro
ducts tend to be complements and, as a result, competition between sel
lers is relatively mild. In the opposite case, when information is rel
iable and/or sellers' sources are highly correlated, consumers are sat
isfied after consulting a single source. In this case, information pro
ducts are substitutes and sellers tend to undercut one another's price
s to induce consumers to choose their brand. Understanding this discon
tinuity in competitive structures has important implications for decis
ion makers as very different strategies are optimal under different pr
oduct characteristics. Under substitution, traditional strategies to a
void competition (e.g., differentiation) are recommended. When the com
peting products' reliability is generally low (they are complements) f
irms are better off accommodating competition. In fact, we find that a
firm may benefit from ''inviting'' a competitor. Finally, our finding
s are also important for regulators of information markets. As the lit
erature on complementarity suggests, price fixing agreements between f
irms offering complementary products may benefit firms as well as cons
umers.