“…Several authors have proposed that IS security standards (Smith, 2010), trust (Teo et al, 2008), or interoperability (Otjacques et al, 2007) are essential to government IS services' delivery. In addition, several authors have also proposed that perceived usefulness and ease of use (Davis, 1989), compatibility (Taylor & Todd, 1995), trust (Gefen, 2000;Gefen et al, 2003), interactivity (Jiang et al, 2010;McMillan & Hwang, 2002;Sicilia et al, 2005), external and interpersonal influences (Bhattacherjee, 2000;Bhattacherjee & Sanford, 2006;Montoya, Massey, & Khatri, 2010), self efficacy (Devaraj et al, 2008;Wu & Lederer, 2009), and facilitating conditions (Gallivan et al, 2003;Venkatesh et al, 2008) are essential to IS services acceptance.…”