In light of on-going global financial crises, the institutional structure of financial regulation is currently a subject of significant academic and practical interest. The financial crisis has called into question the adequacy of financial regulation at the national and supranational levels, and has instigated financial regulatory reforms in major markets overseas. This has included the enactment of the Dodd-Frank Act in the US, and the programme to split the Financial Services Authority in the UK. This book examines the institutional structure reform of financial regulation from a comparative perspective, exploring both fundamental theories and international experiences. The book explores the three main institutional structures of financial regulation in the world; the sectors-based model, adopted in the US, Mainland China and Hong Kong; the twin-peaks model with Australia and the Netherlands as its pioneers; and the single-regulator model as represented by the former Financial Services Authority in the UK and the Financial Services Agency in Japan. The book contains contributions from renowned experts in the field of financial regulation including Douglas Arner, Jeffrey Carmichael, Robin Hui Huang, Dirk Schoenmaker, and Michael Taylor, and will be of interest to students and researchers of banking and finance law, and comparative economics.