The papers in this book cover the wide range of Robert Triffin''s expertise. For example, Jacques Larosire interprets the evolution of the international monetary system. Michel Aglietta critically appraises the international monetary system and suggests the present system is one that does not constrain domestic policy choices. The desirability, scope and means of policy co-ordination are analyzed in the contributions by James Tobin, Robert Solomon, John Williamson, Alexandre Lamfalussy and Wolfgang Rieke. Tommaso Padoa-Schioppa discusses the possible paths to European Monetary Union whilst Alfred Steinherr and Jacques Girard evaluate the past and future evolution of the ECU. Paul De Grauwe provides empirical answers to the highly debated question whether the EMS is a DM-zone.