This book examines different legal systems and analyses how the judge in each of them performs a meaningful review of the proportional use of discretionary powers by public bodies. Although the proportionality test is not equally deep-rooted in the literature and case-law of France, Germany, the Netherlands and the United Kingdom, this principle has assumed an increasing importance partly due to the influence of the European Court of Justice and European Court of Human Rights. In the United States, different standards of judicial review are applied to review ‘arbitrary and capricious’...