We consider amodel for licensing a non-drastic innovation in which the patent holder (an outside innovator) negotiates either up-front fixed fees or perunit royalties with two firms producing horizontally differentiated brands and competing `a la Cournot. We investigate how licensing schemes (fixed fee or per-unit royalty) and the number of licenses sold (exclusive licensing or complete technology diffusion) affect price agreements and delays in reaching an agreement.We show that, under complete information, the patent holder prefers to license by means of upfront fixed fees whatever the degree of product differentiation, the innovation size and the level of bargaining power. Once there is private information about the relative bargaining power of the parties, the patent holder may prefer licensing by means of per-unit royalties even if market competition is strong. Moreover, the delay in reaching an agreement is greater whenever the patent holder chooses to negotiate up-front fixed... JEL classi…cation: C78; D21; D43; D45; L13.CEREC, Saint-Louis University -Brussels; CORE, University of Louvain, Louvain-la-Neuve, Belgium. y CORE, University of Louvain, Louvain-la-Neuve; CEREC, Saint-Louis University -Brussels,Belgium. E-mail: vincent.vannetelbosch@uclouvain.be z Department of Economic Sciences, University of Bologna, Bologna, Italy.We thank an anonymous referee for useful comments. We also thank Paul Belle ‡amme, GianpaoloRossini and seminar audience at