Growth and Economic Development
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Growth and Economic Development

Essays in Honour of A.P. Thirlwall

Edited by Philip Arestis, John S.L. McCombie and Roger Vickerman

This valuable and engaging new book bears eloquent testimony to A.P. Thirlwall’s substantial contribution to economics over the last 40 years. The volume does not attempt to provide a comprehensive review of such a prolific figure, but rather demonstrates the considerable influence that his work on economic theory has had on his contemporaries, and the profession as a whole.
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Chapter 9: On the Core of Macroeconomic Theory

John Cornwall


1 John Cornwall INTRODUCTION The 1997 edition of the American Economic Review, Papers and Proceedings featured a symposium in which noted macro economists presented their views on what constitutes the ‘core’ elements of macroeconomics, encompassing both its short-run and long-run perspectives. This core was to be presented as a set of a few propositions summarizing that part of the framework that was ‘usable’ in the sense that it could explain the salient historical tendencies of macroeconomic development and offer useful policy principles. Given the background of the participants, it could be expected that strong differences in views would emerge, reflecting the major differences between the cores of the two reigning schools of macroeconomics, usually referred to as New Classical Macroeconomics and New Keynesian Macroeconomics. Thus, in one sense the symposium could be seen as a continuation of a running debate within macroeconomics, with the New Classical school allegedly offering rigour and elegance of exposition as the hallmark of its approach. Of special merit was its ability to present a unified body of neoclassical economic analysis, both in its micro foundations of macroeconomics and in a growth theory that extended its short-run macro analysis, something its proponents argued the New Keynesian school had failed to achieve. To this charge New Keynesians have responded that New Classical macroeconomics provides rigour and elegance but at too high a price. Based on the adoption of a competitive equilibrium core, it offers a micro foundation too far removed from reality to provide insight into the...

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