This book presents a revisionist view of monetary policy and monetary regimes. It presents several new mechanisms, indicating that money affects long-term production. The consequent policy implications are also discussed, including: the uses of monetary policy and monetary regimes in achieving macroeconomic goals; the impact of an independent central bank; the effects of a movement from floating exchange rates to fixed exchange rates in a monetary union. In addition to the theoretical and policy discussions the book also contains a comprehensive survey of the current state of scholarship in this area.