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Supply Shocks and Monetary Policy Revisited

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  • Gordon, Robert J

Abstract

This paper reviews the main issues that supply shocks pose for the conduct of monetary policy. A simple version of the Gordon-Phelps model shows that the necessary condition for actual real GNP to be maintained at its equilibrium level in the wake of a supply shock is for the change innominal GNP to exceed the change in the nominal wage by the change in the income share of the raw material in GNP. The required "wedge" between nominal GNP and wage growth can be accomplished by any combination of monetary accommodation and nominal wage flexibility. Without this combination a "macroeconomic externality" occurs, with real CNP falling below its equilibrium level. The obstacles to monetary accommodation are examined in terms of a taxonomic wage adjustment equation that allows for differing responses to current inflation, lagged inflation, and lagged wage change. Monetary accommodation is infeasible when there is full indexation to current inflation and creates a permanent acceleration of inflation following a one-time permanent shock when there is indexation to lagged inflation. With "forward-looking" expectation formation in the sense of Taylor, a supply shock is likely to cause changes in parameters of the wage adjustment equation as workers attempt to avoid the macroeconomic externality. The final section of the paper discusses doctrinal debates that originated in part from the empirical failures of earlier Phillips curves that neglected supply shocks.

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Bibliographic Info

Article provided by American Economic Association in its journal American Economic Review.

Volume (Year): 74 (1984)
Issue (Month): 2 (May)
Pages: 38-43

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Handle: RePEc:aea:aecrev:v:74:y:1984:i:2:p:38-43

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References

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  1. Jeffrey D. Sachs, 1979. "Wages, Profits, and Macroeconomic Adjustment: A Comparative Study," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 10(2), pages 269-332.
  2. Gray, Jo Anna, 1976. "Wage indexation: A macroeconomic approach," Journal of Monetary Economics, Elsevier, vol. 2(2), pages 221-235, April.
  3. Phelps, Edmund S, 1978. "Commodity-Supply Shock and Full-Employment Monetary Policy," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 10(2), pages 206-21, May.
  4. repec:nbr:nberre:0126 is not listed on IDEAS
  5. Brunner, Karl & Cukierman, Alex & Meltzer, Allan H., 1980. "Stagflation, persistent unemployment and the permanence of economic shocks," Journal of Monetary Economics, Elsevier, vol. 6(4), pages 467-492, October.
  6. Taylor, John B, 1980. "Aggregate Dynamics and Staggered Contracts," Journal of Political Economy, University of Chicago Press, vol. 88(1), pages 1-23, February.
  7. Robert E. Lucas, Jr. & Thomas J. Sargent, 1979. "After Keynesian macroeconomics," Quarterly Review, Federal Reserve Bank of Minneapolis, issue Spr.
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Cited by:
  1. Turnovsky, Stephen J, 1987. "Supply Shocks and Optimal Monetary Policy," Oxford Economic Papers, Oxford University Press, vol. 39(1), pages 20-37, March.
  2. Bennett T. McCallum, 1984. "Credibility and Monetary Policy," NBER Working Papers 1490, National Bureau of Economic Research, Inc.
  3. Robert Barsky & Lutz Kilian, 2004. "Oil and the Macroeconomy Since the 1970s," NBER Working Papers 10855, National Bureau of Economic Research, Inc.
  4. Julio J. Rotemberg & Michael Woodford, 1996. "Imperfect Competition and the Effects of Energy Price Increases on Economic Activity," NBER Working Papers 5634, National Bureau of Economic Research, Inc.
  5. Barsky, Robert & Kilian, Lutz, 2000. "A Monetary Explanation Of The Great Stagflation Of The 1970s," CEPR Discussion Papers 2389, C.E.P.R. Discussion Papers.
  6. Lorde, Troy & Jackman, Mahalia & Thomas, Chrystol, 2009. "The macroeconomic effects of oil price fluctuations on a small open oil-producing country: The case of Trinidad and Tobago," Energy Policy, Elsevier, vol. 37(7), pages 2708-2716, July.
  7. Freedman, Charles, 1990. "La politique monétaire des années 90 : leçons et enjeux," L'Actualité Economique, Société Canadienne de Science Economique, vol. 66(2), pages 147-186, juin.

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