In the aftermath of the financial crisis, the business model of international banks is under pressure. Regulators across the world are retrenching to national lines by applying restrictions on cross-border banking. Applying game theory, this book develops a model of the financial trilemma to understand the co-ordination failure among regulators. It also provides governance solutions to overcome this co-ordination failure. The goal is to offer a long-term perspective on international banking for regulators and academics. The book combines academic insights and policy issues.