“…Studies on the macro-level of cities [44][45][46], economic areas [47,48], and national and global industries, particularly logistics and waste [7,14,[49][50][51][52], were only included if they informed implementation on the meso-level, as per the inclusion and exclusion criteria. Other implementation studies focus on reviewing and informing policy [13,16,17,[53][54][55][56][57][58][59][60][61][62][63][64][65][66][67], specifically on product design for the CE [8,9,14,[64][65][66] as well as assessments of firms' [67,68], consumers' [69][70][71], and officials' [72] awareness of and attitudes towards the CE's concepts and its components.…”