I. EU law and executive discretion : concepts, problems, and approaches -- Excutive discretion in the EU and the outer boundaries of law -- Law and discretion : a public law perspective of the EU -- Indeterminacy and legal uncertainty in EU law -- How can EU law contain economic discretion? -- II. EU law and executive discretion in financial, monetary, and economic governance -- The European supervisory authorities and discretion : can the functional and constitutional circles be squared? -- Central bank independence, discretion and judicial review -- Discretion, economic governance, and the (new) political commission -- III. EU discretion, legality, and rationality : judicial review and legal principles -- Judicial review of complex socio-economic, technical, and scientific assessments in the European Union -- The principle of proportionality in EU law : an interest-based taxonomy -- The interdependencies between delegation, discretion and duty of care -- IV. Conclusion -- Framing executive discretion in EU law.