“…Second, the studies make use of various theories, including framing (Kweon, 2000;Löblich, 2011;Schejter & Obar, 2009), determinants of news coverage (Beck, 2001;Gilens & Hertzman, 2000;Hackett & Uzelman, 2003;Kemner et al, 2008;Müller & Donsbach, 2006), political economy (Uzelman et al, 2005), public interest and democracy (Schejter & Obar, 2009;Snider & Page, 1997), actor-centered institutionalism (Maier & Dogruel, 2016), policy networks and negotiations (Pfetsch, 2003) and communicative action (Beck, 2001). It is noteworthy that six studies do not discuss theories and some others only briefly.…”