“…In view of the increasing practical relevance, the number of studies on PBC has increased recently (Selviaridis, 2011), but still surprisingly few academic publications have researched this subject (Buchanan and Klingner, 2007;Hypko et al, 2010;Selviaridis, 2011). In particular, there is a lack of empirical evidence (Holmbom et al, 2014), even if first empirical studies analyze PBC (Randall et al, 2014) or develop hypothesis from case studies or interviews for later empirical testing (Caldwell et al, 2009;Selviaridis and Norrman, 2014;Randall et al, 2015). At the same time, many authors stress on the uniqueness of each PBC, their situation and case-specific design and focus on the "one size does not fit all" of PBC (Hicks, 2012;Sols et al, 2007;Burkett, 2009;Geary and Vitasek, 2008).…”