A firm is subject to "economic exposure" if changes in exchange rates affec
t the firm's value, as measured by the present value of its future cash flo
ws. This paper shows that in many forms of competition, including the most
commonly studied case of monopoly, the economic exposure of an exporting fi
rm is simply proportional to the firm's net revenues based in foreign curre
ncy. This simple result breaks down under some, but not all, forms of compe
tition between the exporting firm and foreign firms. In that case, the expo
rting firm needs to know about the price elasticity of its product demand a
nd its marginal cost in order to assess its exposure to exchange rates. The
key determinant of economic exposure, therefore, is the competitive struct
ure of the industry in which a firm operates. (C) 2001 Elsevier Science Ltd
. All rights reserved.