- International Monetary Fund
- Published Date:
- June 1991
Macroeconomic Models forAdjustment inDeveloping Countries
Edited by Mohsin S. Khan, Peter J. Montiel,
and Nadeem U. Haque
International Monetary Fund
© 1991 International Monetary Fund
Library of Congress Cataloging-in-Publication Data
Macroeconomic models for adjustment in developing countries / edited by Mohsin S. Khan, Peter J. Montiel, and Nadeem U. Haque.
Includes bibliographical references.
1. Developing countries—Economic policy—Econometric models.
2. Economic stabilization—Developing countries—Econometric models.
I. Khan, Mohsin S. II. Montiel, Peter J. III. Haque, Nadeem UI.
IV. International Monetary Fund.
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Mohsin S. Khan, Peter J. Montiel, and Nadeem U. Haque
Carmen M. Reinhart
Mohsin S. Khan and Malcolm D. Knight
Bijan B. Aghevli and Cyrus Sassanpour
Ichiro Otani and Cyrus Sassanpour
Nadeem U. Haque, Kajal Lahiri, and Peter J. Montiel
Nadeem U. Haque and Peter J. Montiel
Nadeem U. Haque, Peter J. Montiel, and Steven Symansky
The following symbols have been used throughout this paper:
… to indicate that data are not available;
— to indicate that the figure is zero or less than half the final digit shown, or that the item does not exist;
– between years or months (e.g., 1987–88 or January–June) to indicate the years or months covered, including the beginning and ending years or months;
/ between years (e.g., 1987/88) to indicate a crop or fiscal (financial) year.
“Billion” means a thousand million.
Minor discrepancies between constituent figures and totals are due to rounding.
The term “country,” as used in this book, does not in all cases refer to a territorial entity that is a state as understood by international law and practice; the term also covers some territorial entities that are not states, but for which statistical data are maintained and provided internationally on a separate and independent basis.
The use of macroeconomic models for the design of adjustment programs has a long history in the IMF. The IMF’s approach to economic stabilization, generally referred to as “financial programming,” is based to a large extent on the models developed in the Fund during the 1950s and 1960s by, among others, J.J. Polak and E. Walter Robichek. The analytical foundation underpinning financial programming has come to be known in the literature as “the monetary approach to the balance of payments.” Financial programming essentially aims at ensuring consistency between the impact of proposed policy measures and a desired balance of payments outcome. This consistency reflects the interaction between a set of balance sheet and behavioral relationships linking the assets and liabilities of the banking system to the balance of payments.
The earlier IMF models are basically formalizations of the monetary approach to the balance of payments. They start from the proposition that in an open economy with a fixed exchange rate, the money supply is an endogenous variable reacting to surpluses and deficits in the balance of payments and not an exogenous policy instrument, as is customarily assumed in a closed economy. Though using somewhat different assumptions and structures, these models derive a formal relationship between changes in the domestic component of the money stock (domestic credit) and changes in international reserves, which can then be employed for setting policy. Specifically, the models allow one to obtain a value for the policy variable—domestic credit—that is consistent with a desired balance of payments position.
This volume contains a selection of the more recent models developed in the IMF dealing with adjustment and stabilization policies in developing countries. The macroeconomic models of the 1980s, while retaining the basic insights of the monetary approach to the balance of payments, have gone well beyond the simple structures outlined in the earlier formulations. For example, they now include objectives in addition to the balance of payments—principally output and inflation—as well as consideration of other policy instruments along with the rate of domestic credit expansion. Such developments were only to be expected, given the advancement of theoretical understanding of macroeconomic relationships, the refinement of econometric methods, and the dramatic improvement in computer technology which has greatly facilitated experimentation with alternative assumptions of macroeconomic behavior.
The newer generation of models included in this volume represents efforts by IMF staff to specify and estimate models that incorporate many of the key structural and institutional characteristics that make developing countries differ significantly from most developed economies. These features include the absence of well-developed equity and capital markets, the existence of credit and foreign exchange rationing that leads to the emergence of parallel markets and curb markets for credit, foreign financing constraints, and underdeveloped fiscal systems that result in frequent use of inflationary finance.
The new generation of models stresses the role, among others, of dynamics, expectations, relative prices, foreign debt issues, and exchange rate policy. The dynamic nature of economic relationships is an important consideration, since it permits an understanding of both the short- and the long-run costs and benefits of alternative policy measures, as well as the path of adjustment. To policymakers, the latter is often just as important as the initial and ultimate effects of a change in policy. By striving to capture expectations and lagged responses in one form or another, the models presented in this volume are capable of addressing dynamic issues. The role that relative prices play in affecting production and consumption decisions is now commonplace. Foreign debt issues, particularly those relating to optimal borrowing and to the effects of the debt stock and debt servicing on the level of economic activity and on the balance of payments, are routinely addressed in macroeconomic models. Since exchange rate policy has assumed much more importance in the adjustment process, it receives correspondingly greater attention than was given to it in the early formulations of the monetary approach to the balance of payments. The above examples are only a subset of the many advances that have been made. Basically, the overriding intention has been to bring a greater degree of realism into macroeconomic models, enabling better explanation of macroeconomic behavior and thereby an improvement in the quality of the input they can provide in the design and implementation of adjustment programs.
Nevertheless, the current macroeconomic models do not necessarily represent the last word. Model building is an evolutionary process that will continue to reflect new developments in economic theory, new econometric methods, and better understanding of the structure of developing economies. As such, the contributions contained in this volume may be viewed as a progress report of an ongoing research program aimed at improving economic policymaking in developing countries.
Jacob A. Frenkel
Economic Counsellor and Director of Research
International Monetary Fund
List of Authors
Pierre-Richard Agénor, Research Department, IMF
Bijan B. Aghevli, Research Department, IMF
Nadeem U. Haque, Research Department, IMF
Mohsin S. Khan, Research Department, IMF
Malcolm D. Knight, Middle Eastern Department, IMF
Kajal Lahiri, Professor of Economics, State University of New York
Leslie Lipschitz, European Department, IMF
Peter J. Montiel, Research Department, IMF
Ichiro Otani, IMF Institute
Carmen M. Reinhart, Research Department, IMF
Cyrus Sassanpour, Middle Eastern Department, IMF
Steven Symansky, Research Department, IMF
Reza Vaez-Zadeh, Central Banking Department, IMF
Edited for publication by
Elin Knotter, External Relations Department