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Shapiro (2001) - Navigating The Patent Thicket (view source)
Revision as of 23:50, 25 March 2013
, 23:50, 25 March 2013→Model
:<math>\frac{p - \underbrace{\alpha - \sum_i c_i}{c}}{p} = \frac{N}{\eta}\;</math>
With a single firm, <math>N=1\;</math>, the Lerner index is <math>\frac{1}{\eta}\;</math>, so with <math>N\;</math> firms the mark-up is <math>N\;</math> times the standard monopoly mark-up.
===Hold-up===
