This book explores the role of constitutions in public finance, with a special focus on transitional context in Central and Eastern Europe. The main questions addressed are: How do formal constitutional provisions that matter for public finance come about? How do constitutions shape policy choices in public finance? Part l of the book puts forth an analytical framework for analysing how fiscal constitutional provisions come about and tests the conjectures with the case of constitution-making in Estonia in 1991-1992. Part II summarises, synthesises and criticises the emerging orthodoxy in positive constitutional public finance and examines whether it can explain the commitment to fiscal discipline in Estonia