“…There is not much debate about input and output additionality, but behavioral additionality concept has been broadly debated by scholars. R&D capabilities (Boeing, 2014;Bronzini and Piselli, 2016;Clarysse et al, 2009;Guan and Yam, 2015;Hsu et al, 2009;Radas et al, 2015), project size (Falk, 2007), productivity (Duguet, 2003) Collaboration (Clarysse et al, 2009;Falk, 2007;González and Paz o, 2008;Hsu et al, 2009;Hyvärinen and Rautiainen, 2007;Kang and Park, 2012;Radas et al, 2015) risk (Blind, 2012;Czarnitzki et al, 2007;Falk, 2007;Hsu et al, 2009;Radas et al, 2015) have been defined as behavioral additionalities. A set of indices are commonly introduced to explain behavioral additionality based on empirical observations; however, few attempts have been carried out to recognize such indices in the behavioral theories of the firm.…”