<P>FinTech transformations have brought changes to the global financial markets and merit the attention of financial regulators across jurisdictions.</P><P>This book is one of the first ones of its kind to look at open banking (OB). It examines regulatory approaches to OB by taking a broad view of comparative legal systems and through perspectives of transaction costs, public choice, and institutional design.</P><P>The book looks at the legal implications by engaging in a two-tiered comparative analysis: comparing between compulsory and voluntary approaches to OB policies and comparing the legal systems between the West (i.e., the EU and the UK) and an Asian economy (i.e., Taiwan).</P>