“…In fact, firms engaged in such innovation-based collaboration have seen increases in both economic performance (Belderbos et al, 2004b) and innovative output (Sherwood and Covin, 2008;Tether, 2002;Zeng et al, 2010). Although the latter depends, for example, on partner firms' depth of knowledge, the nature of the partnership, and the level of the vertical integration of the focal firm Mention, 2011;Srivastava and Gnyawali, 2011), by partnering, firms enhance their ability to innovate and are thus more likely to patent (Galende, 2006;Gesing et al, 2015;Schilling and Phelps, 2007).…”