An analysis of cross-elasticity of demand is a key ingredient in defining the product market. Assume
that two products, X and Y, appear to be competitors. Assume that the price of X doubled and Y’s
sales volume was unchanged. What does that tell individuals about whether X and Y are, in fact, in the
same product market? Products closely matched in price, use, and quality are interchangeable, and
thus are competitors in the same product market.
B. 2. Geographic Market
The judicial decisions to date offer no definitive explanation of the geographic market concept. A
working definition might be “any section of the country were the product is sold in commercially
significant quantities.” From an economic perspective, the geographic market is defined by elasticity.
The geographic market must be broadened to embrace new sources of supply. If not, the geographic
market is not larger than the area in question. A better approach is to read the cases and recognize
that each geographic market must simply be identified in terms of its unique economic properties.
C. 3. Market Power (Market Share)
How large a share must be to raise monopoly concerns depends on a variety of considerations
including how fragmented or concentrated the market is. Market share alone, however, does not
establish monopoly power. Barriers to entry, economies of scale, the strength of the competition,
trends in the market, and pricing patterns all help to determine whether the market remains
competitive despite a single firm’s large share.
D. 4. Intent (Predatory or Coercive Conduct)
A monopoly finding requires a showing of both market power (structure) and willful acquisition or
maintenance of that power (conduct). Antitrust law is not designed to attack legitimately earned market
power. Rather, the concern lies with those holding monopoly power that was acquired or maintained
wrongfully. Thus, a showing of deliberate, predatory, coercive, or unfair conduct (such as collusion
leading to price fixing) will normally suffice to establish the requisite intent. In 2009, Intel agreed to pay
$1.25 billion to settle claims AMD brought in a patent and antitrust lawsuit, and the European Union
fined Intel a record $1.45 billion for antitrust offenses.
E. 5. Defenses
The defendant may yet prevail if the evidence demonstrates that the monopoly was innocently
acquired via “superior skill, foresight, or industry;” that is, the monopoly was earned. Sometimes a
monopoly may be “thrust upon” the monopolist because the competition failed or because of “natural
monopoly” conditions where the market will support only one firm or where large economies of scale
exist (such as for electricity suppliers).
II. Attempted Monopolization
The Sherman Act forbids attempts to monopolize as well as monopoly itself. In the 1993 Spectrum Sports
decision, the Supreme Court set out a three-part test for attempted monopolization: (1) that the defendant
has engaged in predatory or anticompetitive conduct with (2) a specific intent to monopolize and (3) a
dangerous probability of achieving monopoly power.