Fig. 4From: What do we know about the impacts of the Marine Stewardship Council seafood ecolabelling program? A systematic mapStructured matrices showing the number of included (top) and excluded (bottom) articles focusing on each topic category, by geographic scale (global or case study) and study perspective (empirical or theoretical). The darker the colour the greater the number of articles in that cross tabulation of topic category and study scale/study perspectiveBack to article page