“…A second decision refers to the inclusion of control variables. Whereas some studies did not include control variables (e.g., Acquisti & Gross, 2006), others controlled for attitudes and intentions (e.g., Dienlin & Trepte, 2015), trust towards providers (e.g., Utz & Krämer, 2009), benefits of using online services (e.g., Dienlin & Metzger, 2016;Krasnova et al, 2012), privacy cynicism (Lutz et al, 2020), self-efficacy (Chen & Chen, 2015;Dienlin & Metzger, 2016), or privacy violation experiences (e.g., Awad & Krishnan, 2006). Many studies also controlled for socio-demographics (e.g., age, gender, education; Blank et al, 2014;Dienlin et al, 2019;Lutz & Strathoff, 2014).…”