“…Consumers who purchase certified ethical food products at a premium price are not driven by selfish motives but by altruistic motives (Bougherara & Combris, 2009). The underlying mechanism of these altruistic motives is debatable, with some authors favouring attitudinal approaches like environmental concern (Sirieix, Kledal, & Sulitang, 2011;Thøgersen, 2010), and others favouring moral approaches like personal norms (Biel & Thøgersen, 2007;Gärling, 1999;Gärling, Fujii, Gärling, & Jakobsson, 2003;Van der Iest, Dijkstra, & Stokman, 2011), while it even has been argued that complete selflessness does not exist and that choices for ethical products are at least partly guided by selfish motives, such as impression management (Griskevicius et al, 2010;White & Peloza, 2009).…”