“…Finally, a third assumption relates to the window over which an alliance portfolio is defined. Consistent with the approach taken in a number of recent alliance studies (e.g., Bos, Faems, & Noseleit, 2017;Cui, Yang, & Vertinsky, 2018;Tyler & Caner, 2016;Van de Vrande, 2013;Yang, Lin, & Peng, 2011), I use a 5-year window to recognize that alliances continue beyond just the year in which they were established, but that they are at the same time finite in their lifespan.…”