Credibility and Credulity: How Beliefs about Beliefs Affect Entry Incentives

Alan C. Marco, Vassar College
Kieran J. Walsh, Federal Reserve Bank of New York

Abstract

In this note we investigate the infringement (entry) decision for a firm facing an incumbent patent holder with uncertain patent rights. The entrant risks a dispute by entering, resulting in either a settlement (licensing) or litigation and trial. Using the litigation model described by Priest and Klein, we investigate the expected dispute resolution and its impacts on the entrant's pre-dispute behavior. The primary contribution is to show that the entrant's expectations about the patent holder's beliefs about patent enforceability are a driving factor behind the entry decision. We develop a simple taxonomy of entrant and incumbent types to explain the entry decision.