Mr. Keynes, Prof. Krugman, IS-LM, and the End of Economics as We Know It
Krugman has recently revitalized IS-LM with a number of succinct analytical pieces on his blog. The reverberations were remarkable. Economists, however, are known often not grasp the full content of their own and, a fortiori, of others’ models. This happened to Keynes in the days of high theory and to Krugman in these days. Keynes applied a defect formalism, which is here replaced by objective-structural axioms. This yields the correct relationship between retained profit, saving, and investment which in turn makes it clear after the event that the IS-part of the IS-LM construct never could bear any substantive theoretical load.
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"Reconstructing the Quantity Theory (I),"
32421, University Library of Munich, Germany.
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- Olivier Blanchard, 2000. "What Do We Know about Macroeconomics that Fisher and Wicksell Did Not?," The Quarterly Journal of Economics, Oxford University Press, vol. 115(4), pages 1375-1409.
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- Robert G. King, 1993. "Will the New Keynesian Macroeconomics Resurrect the IS-LM Model?," Journal of Economic Perspectives, American Economic Association, vol. 7(1), pages 67-82, Winter. Full references (including those not matched with items on IDEAS)
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