1. Introduction --; References --; 2. A General Equilibrium Theory of Exchange Rates and Managed Floating --; 1. Multiple Stochastic Exchange Rate Equilibria --; 2. Price Uncertainty and Flexible Exchange Rates --; 3. A Welfare Analysis --; References --; 3. Empirical Implementation of the Instability Hypothesis --; 1. Instability and Theoretical Models --; 2. Modelling Considerations --; 3. The Model --; 4. Equilibrium with Government Intervention --; 5. Dominican Currency Crises --; 6. Concluding Remarks --; References --; 4. Currency Substitution and Small Open Economies: The Case of the Dominican Republic --; 1. Stylized Institutional Features of the Dominican Republic Parallel Market --; 2. The Empirical Model --; 3. Empirical Analysis --; 4. Summary and Conclusions --; Notes --; References --; 5. Dominant Currencies and Monetarism in Argentina --; 1. Introduction --; 2. Basic Dominant Currency Modelling Considerations --; 3. A Summary of Argentina's Exchange Rate Systems 1956-82 --; 4. The Case of Argentina --; 5. Evidence of One Way Currency Substitution --; 6. Money, Exchange Rates, and Prices --; References --; 6. Venezuela and Ecuador --; Currency Substitution in Oil Economies --; 1. Stability and Homogeneity --; 2. Frequency Analysis of Money and Prices --; 3. Concluding Remarks --; References --; 7. Conclusion.