“…In line with the knowledge accumulated in research on UBC (e.g., Davey et al, 2011) the subjective information provided by the survey respondents is generally of very high utility (Walters, 2004) although it has been frequently ignored because of the respondents' level of experience and assessment capabilities (Lowe & Krahn, 1995). In line with other surveys in the field of UBC (e.g., Bacila et al, 2009;Jung, 2011;Okamuro et al, 2011;Iammarino et al, 2012;Yeo & Lee, 2012;De Marchi & Grandinetti, 2013;Hewitt-Dundas, 2013;Plewa et al, 2013;Sohal, 2013;Franco et al, 2014;Isabel Maria et al, 2014;Muscio & Vallanti, 2014;Plewa et al, 2015), the target enterprises were examined by non-probability sampling, implementing principles of quota, purposive and convenience sampling (sector distribution, size of the company, evidence of UBC, geographical scope and level of technological advancement; for a detailed description of the sampling procedure, see Melink et al, 2014, pp. 13-14).…”