This treatise sets forth a comprehensive analysis of administrative law in the United States. Administrative law continues to evolve in interesting ways in all of its various dimensions. The authors address the new developments in the law of standing, congressional attempts to make agencies more accountable, the constitutionality (or lack thereof) of the Line Item Veto Act, among other issues. The fundamental purposes of this book are to assess and explain fundamental doctrines of administrative law, placing some of the most important aspects of those doctrines in a historical context, and setting forth the current state of the law. The book is intended to serve practitioners, scholars and students of administrative law.