The global financial crisis that started in 2007 sparked several academic debates about the role that financial sector regulators played in the crisis and prompted policy reforms in the financial supervision architectures of several countries. This book focuses on the question of what accountability, independence, transparency and, more generally, governance mechanisms applicable to financial regulators can better contribute to building responsive, responsible and effective regulatory and supervisory frameworks that tackle the weaknesses of the pre-crisis regimes. It re-visits the concepts of accountability and independence of financial regulators as well as the main economic theories underlying financial services policy-making, in light of the crisis experience. In addition, it critically examines the post-crisis institutional frameworks of financial regulation and supervision in the EU, the US and Canada with a view to assessing whether the financial regulators of the post-global financial crisis era are well suited to effectively address the challenges and threats that global financial markets pose to the stability, integrity and good functioning of financial systems as well as to the protection of consumers, investors and society at large.