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An Important Inconsistency at the Heart of the Standard Macroeconomic Model

Listed author(s):
  • Wynne Godley
  • Anwar M. Shaikh

The standard neoclassical model is the foundation of most mainstream macroeconomics. Its basic structure dominates the analysis of macroeconomic phenomena, the teaching of the subject, and even the formation of economic policy. And of course the modern quantity theory of money and its attendant monetarist prescriptions are grounded in the model's strict separation between real and nominal variables. It is quite curious, therefore, to discover that this model contains an inconsistency in its treatment of the distribution of income which should become apparent if Walrus' law is appropriately articulated. And when this seemingly small discrepancy is corrected, without any change in all of the other assumptions, many of the model's characteristic results disappear. Two instances are of particular interest. First, the strict dichomoty between real variables and nominal variables breaks down, so that, for example, an increase in the exogenously given money supply changes real variables such as household income, consumption, investment, the interest rate, and hence real money demand. Secondly, since the price level depends on the interaction of real money demand and the nominal money supply, and since the former is now affected by the latter, price cahnges are no longer proportional to changes in the money supply. Indeed, we will demonstrate that prices can even fall when the money supply rises. The link to the quantity theory of money, and to monetarism, is severed. Patinkin in his classical work (1965) papers over the cracks in an unsatisfactory adhoc way.

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Paper provided by Levy Economics Institute in its series Economics Working Paper Archive with number wp_236.

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Date of creation: May 1998
Handle: RePEc:lev:wrkpap:wp_236
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  1. Buiter, Willem H, 1980. "Walras' Law and All That: Budget Constraints and Balance Sheet Constraints in Period Models and Continuous Time Models," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 21(1), pages 1-16, February.
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