“…Various disciplines have contributed to this body of knowledge (Raasch et al, 2013), including scholars in economics (Boudreau and Jeppesen, 2015;Zhang and Zhu, 2011), information systems (Bagozzi and Dholakia, 2006;Fershtman and Gandal, 2007;Kane and Ransbotham, 2016;Kraut et al, 2012;Ren et al, 2012;Stewart and Gosain, 2006) and organizational theory (Alexy et al, 2013;Gallus, 2016;Jeppesen and Frederiksen, 2006;Lakhani and Wolf, 2005;Shah, 2006). They draw upon different motivational theories, e.g., of selfdetermination (Ryan and Deci, 2000), social identity (Tajfel et al, 1971), self-concept (Leonard et al, 1999), and norms (Alexy and Leitner, 2011)) to explain why individuals contribute to different forms of communitybased knowledge production (e.g., knowledge platforms (Nagaraj, 2017a;Nov, 2007), ideation initiatives (Bayus, 2013;Dahlander and Piezunka, 2014), free and open-source software (Greenstein and Zhu, 2012;Lerner and Tirole, 2002)). Our focus is on research that examines why people start contributing as well as on research that examines why people continue to contribute.…”