“…Organizational theorists highlight how firm density is shaped by forces of legitimization and competition (Aldrich & Fiol, 1994;Hannan & Freeman, 1977) and note the role of social movements (Hiatt, Sine, & Tolbert, 2009;Pacheco, York, & Hargrave, 2014;Rao, 1994;Sine et al, 2005;Weber, Heinze, & DeSoucey, 2008) and socio-cognitive categories (Santos & Eisenhardt, 2009;Wry, Lounsbury, & Glynn, 2011) in influencing entrepreneurial entry and legitimizing industries. Technology management scholars attribute the rise in the number of firms to the need for experimentation prior to dominant design (Abernathy & Utterback, 1978;Tushman & Anderson, 1986), and they link experimentation paths to heterogeneity in firms' prior knowledge (Kapoor & Furr, 2015) or cognitive frames (Anthony, Nelson, & Tripsas, 2016;Benner & Tripsas, 2012;Garud & Rappa, 1994).…”