“…2012),Balland et al (2014),Boschma (2005), D'Este et al (2013),Hong and Su (2013), Huber (2011), Mattes (2012,Rosenkopf and Almeida (2003),Slavtchev (2013),Aguiléra et al (2012),Autant et al (2007),Broekel and Boschma (2012), Hoekman et al (2010) Organizational Similarity in routines, regulations, and incentives between organizations Heringa et al (2014), Knoben and Oerlemans (2006), Capaldo and Petruzzelli (2014), Balland (2012), Balland et al (2014), Boschma (2005), Bruneel et al (2010), D'Este et al (2013), Hong and Su (2013), Huber (2011), Mattes (2012), Aguiléra et al (2012), Broekel and Boschma (2012) Social Degree of common relationships (personal relationships between actors involving trust, friendship, and previous collaborations) Heringa et al (2014), Knoben and Oerlemans (2006), Balland (2012), Balland et al (2014), Boschma (2005), Bruneel et al (2010), Hong and Su (2013), Huber (2011), Mattes (2012), Aguiléra et al (2012), Autant et al (2007), Broekel and Boschma(2012)…”