“…Of the 42 studies, 10 assess criticality at the global level exclusively (Buchert, Schüler et al 2009, Rosenau-Tornow, Buchholz et al 2009, Bauer, Diamond et al 2010, Bauer, Diamond et al 2011 (Duclos, Otto et al 2010, Nieto, Guelly et al 2013, Bensch, Kolotzek et al 2015, Gardner and Colwill 2016, Lapko, Trucco et al 2016, Miehe, Schneider et al 2016, Hallstedt and Isaksson 2017, Gardner and Colwill 2018, Kolotzek, Helbig et al 2018). An additional 7 studies address the global, national, and firm levels (Graedel, Barr et al 2012, Graedel, Gunn et al 2014, Helbig, Wietschel et al 2016, Knobloch, Zimmermann et al 2018. The final study in the group of 42 focuses on the global and national level (Nassar, Graedel et al 2015).…”