This paper analyzes a model of duopoly with fixed costs. Leadership by one "established" firm may yield an outcome in which the second is inactive, but entry prevention is not a prior constraint. We find that two aspects of product differentiation have distinct effects: an absolute advantage in demand for the established firm makes entry harder, but a lower cross-price effect facilitates it. In the basic model we maintain the same quantity after entry. An extension of the model deals with the case where the threat of a predatory output increase after entry is made credible by carrying excess capacity prior to entry.
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Volume (Year): 10 (1979) Issue (Month): 1 (Spring) Pages: 20-32 Download reference. The following formats are available: HTML
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