The costs and benefits of the stakeholder groups with respect to certification are outlined as this will influence the incentives, or disincentives, to use certification. Another key issue addressed is the role of public authorities in the market for certification. However, these have remained limited in terms of application (Franz, 2005). At the global level, two major certification efforts predominate: the Best Aquaculture Practices of the Global Aquaculture Alliance and the WWF Aquaculture Dialogues. In addition, inspired by the model of the Marine Stewardship Council for capture fisheries, the Aquaculture Stewardship Council will be operative in 2011 and manage a range of standards (based on species) developed through the Aquaculture Dialogues.