“…This cost-benefit logic is also strongly present in scholarly studies applying the principal-agent model to the case of the EU. Whether it concerns the Commission, Court of Justice, agencies, the rotating Presidency or the Council Secretariat, delegation is the result of a demand for efficiency and credibility, which the member states cannot or do not want to supply themselves (Pollack 1997(Pollack , 2003Beach 2005;Tallberg 2002Tallberg , 2006Franchino 2007;Dijkstra 2010). Not all delegation within the EU, however, follows a functional logic.…”