“…While most of the focus has been on productivity growth in the production phase (Asche & Roll, 2013;Asche, Roll, & Tveteras, 2009;Rocha Aponte & Tveterås, 2019;Roll, 2013;Tveteras, 1999;Vassdal & Holst, 2011), the importance of innovation in the supply chain (Asche, Cojocaru, & Roth, 2018;Asche, Roll, & Tveteras, 2007;Kvaløy & Tveteras, 2008;Olson & Criddle, 2008) and demand growth have also been recognized (Asche, Dahl, Gordon, Trollvik, & Aandahl, 2011;Braekkan, Thyholdt, Asche, & Myrland, 2018;Braekkan & Thyholdt, 2014). 1,2 There are also a few studies that more specifically investigate agglomeration effects at the production level in Norwegian salmon aquaculture.…”