This collection examines recent developments in exchange rate analysis. In the first part, two exchange rate models are proposed: a model which combines heterogeneous agents and transaction costs, and a dynamic general-equilibrium two-country sticky-price model. The second part of the book deals with econometric aspects of the exchange rate dynamics linked to regime-switching and structural breaks. In the third part of the book, an analysis of speculative attacks and monetary policy is presented. INDICE PART I: EXCHANGE RATE MODELS Heterogeneity of Beliefs and Exchange Rate Dynamics; P.De Grauwe & M.Grimaldi Real Exchange Rate Persistence in DGE Sticky-Price Models: An Analytical Characterization; H.Bouakez PART II: STRUCTURAL BREAKS AND REGIME SWITCHING Real Exchange Rate Dynamics: An Alternative Approach; Y-W Cheung & U.Erlandsson Structural Break and Unit Roots in Black Market Real Exchange; M.Cerrato & N.Sarantis PART III: SPECULATIVE ATTACKS AND MONETARY POLICY The Role of Foreign Speculators during Speculative Attacks: The Case of 1998; G.Bjønnes, D.Rime & H.O.A.A.Solheim Exchange Rate Policy and Foreign Debt: When is a Fear of Floating Optimal?; W.Berger Learning and Coordination Against a Fixed Exchange Rate; C.Charmley