RT Journal Article T1 Per-unit versus ad-valorem royalty licensing in a Stackelberg market A1 Antelo Suárez, Manel A1 Bru Martínez, Lluís K1 Licensing K1 Per-unit royalties K1 Ad-valorem royalties K1 Leader K1 Follower K1 Welfare AB We consider licensing of a non-drastic innovation by a licensor that interacts with a potential licensee in a Stackelberg duopoly, comparing per-unit and ad-valorem royalty two-part contracts and showing why and when each licensing deal should be used. We contribute three findings to the literature. First, ad-valorem royalty is preferred when the licensor plays as leader in the marketplace, but per-unit royalty is preferred when the licensor plays as follower. Second, only innovations that do not hurt consumers are socially beneficial. Third, our model also suggests that both the licensor’s status as a leader or follower in the marketplace and the innovation size determine the incentive to engage in innovative activities PB Springer YR 2021 FD 2021 LK http://hdl.handle.net/10347/30066 UL http://hdl.handle.net/10347/30066 LA eng NO Antelo, M., Bru, L. Per-unit versus ad-valorem royalty licensing in a Stackelberg market. J. Ind. Bus. Econ. 49, 95–109 (2022). https://doi.org/10.1007/s40812-021-00205-x NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. Manel Antelo acknowledges financial support from Consellería de Cultura, Educación e Ordenación Universitaria (Xunta de Galicia) through Grant GRC 2019 and Lluis Bru from the Ministerio de Economía e Innovación (Gobierno de España) (ECO2017) through Grant PID2020-115018RB-C33. Beyond this, the paper received no specific grant from any funding agency in the public, commercial, or non-profit sectors DS Minerva RD 22 abr 2026