“…Competitors can be identified by means of market definition (Patterson & McCullough, 1980), demand-side approaches, i.e. consumer perceptions (Shocker et al, 1990), supply-side approaches, including competences (Gorman & Howard, 1997) and resource similarity concepts (Bergen & Peteraf, 2002), or managerial perceptions (Mohammed et al, 2014). Thereby, direct, indirect, potential and historical competitors are of interest (Bergen & Peteraf, 2002;Chen, 1996;B.…”