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1: The Linkage System -- 1.1 Introduction -- 1.2 Some Conventions -- 1.3 Elements of a World Trade Linkage Model -- 1.4 Methods of Trade Linkage -- 1.5 A Sluice -- Footnotes to Chapter 1 -- 2: Import Allocation Models -- 2.1 Introduction -- 2.2 Theoretical Considerations -- 2.2.4 The adding-up condition -- 2.3 Empirical Models -- 2.4 Summary and Concluding Remarks -- Footnotes to Chapter 2 -- 3: On the Use of Elasticities of Substitution -- 3.1 Introduction -- 3.2 Basic Definitions -- 3.3 The Nature of the Experiment -- 3.4 A Framework for Elasticities -- 3.5 A Generalisation of the Two-Factor Case ? -- 3.6 Short-Run Elasticities of Substitution -- 3.7 Constant Elasticities of Substitution -- 3.8 Summary and Concluding Remarks -- Footnotes to Chapter 3 -- 4 Maximum Likelihood Estimation of Nonlinear Models with Linear Constraints on the Functional Form -- 4.1 Introduction -- 4.2 Constrained Model and Lopped Model -- 4.3 A Homoscedastic Covariance Matrix -- 4.4 A Special Case with a Heteroscedastic Covariance Matrix -- 4.5 Summary and Conclusions -- Footnotes to Chapter 4 -- 5: A Model with Pairwise Differing Elasticities of Substitution -- 5.1 Introduction -- 5.2 The Cresh Model with Constant Returns to Scale -- 5.3 Three Approximations -- 5.4 An Interpretation as Total Allocation Model -- 5.5 Summary and Conclusions -- Footnotes to Chapter 5 -- 6: Econometric Specification -- 6.1 Introduction -- 6.2 A Further Simplification -- 6.3 Stochastic Specification -- 6.4 Static Model Without Time Trend -- 6.5 Static Model With Time Trend -- 6.6 Dynamic Model Without Time Trend -- 6.7 Dynamic Model With Time Trend -- 6.8 Summary and Concluding Remarks -- Footnotes to Chapter 6 -- 7: The Data -- 7.1 Introduction -- 7.2 Compatibility of Classifications -- 7.3 Price Indices; Current and Constant Prices -- 7.4 Anomalies -- 7.5 The Domestic Aggregate -- 7.6 Concluding Remarks -- Appendix 7.A Goods Classification -- Appendix 7.B Composition of the Zones -- Footnotes to Chapter 7 -- 8: Estimation -- 8.1 Introduction -- 8.2 Model Characteristics -- 8.3 The Covariance Matrix -- 8.4 The Aggregate Trade Model -- 8.5 Models Per Category of Goods -- 8.6 Summary and Concluding Remarks -- Appendix 8.A Detailed Estimation Results -- Footnotes to Chapter 8 -- 9: Hypothesis Testing -- 9.1 Introduction -- 9.2 The General Test Procedure -- 9.3 Weak Separability -- 9.4 Classification of Partners -- 9.5 Classification of Goods -- 9.6 Summary and Concluding Remarks -- Appendix 9.A A Small-Sample Correction for the Likelihood Ratio Test -- Footnotes to Chapter 9 -- 10: Conclusions -- 10.1 Theory -- 10.2 Practice -- 10.3 Suggestions for Further Research -- References -- Author Index.

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