Though European administrative laws have gained global significance in the last few decades, research which provides both theoretical analysis and original empirical research has been scarce. This book offers an important account of the evolution of judicial review and administrative procedure legislation, using a factual analysis to shed light on how the different legal systems react to similar problems. Discussing the concept of a ‘common core’, Giacinto della Cananea reveals the commonalities in, and differences between, the foundational assumptions of European administrative adjudication and rule-making.