“…Most of the literature on technology licensing analyzes various aspects of licensing in one-tier markets, such as the choice among licensing fee and royalties (e.g., Kamien and Tauman, 1986, Muto, 1993, Wang, 1998, the use of licensing for entry deterrence (Gallini, 1984), the impact of licensing on innovation (e.g., Gallini and Winter, 1985), and the choice among licensing and merger (Fauli-Oller and Sandonis, 2003). Our paper is closely related to the limited literature that examines licensing in vertically related markets, such as Mukherjee (2003), Arya and Mittendorf (2006), Mukherjee and Ray (2007), Rey and Salant (2012), Bakaouka and Milliou (2018). This literature shows that horizontal licensing in the downstream market is pro…table only if it enhances competition in the upstream market (Mukherjee, 2003) or if it creates a weak rival (Arya and Mittendorf, 2006).…”