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Inventories, Inflation Dynamics and the New Keynesian Phillips Curve

  • Thomas A Lubik
  • Wing Teong Teo

We introduce inventories into an otherwise standard New Keynesian model and study the implications for in.ation dynamics. Inventory holdings are motivated as a means to generate sales for demand-constrained .rms. We derive various representa- tions of the New Keynesian Phillips curve with inventories and show that one of these speci.cations is observationally equivalent to the standard model with respect to the behavior of in.ation when the model.s cross-equation restrictions are imposed. How- ever, the driving variable in the New Keynesian Phillips curve - real marginal cost - is unobservable and has to be proxied by, for instance, unit labor costs. An alternative approach is to impute marginal cost by using the model.s optimality conditions. We show that the stock-sales ratio is linked to marginal cost. We also estimate these various speci.cations of the New Keynesian Phillips curve using GMM. We .nd that predictive power of the inventory-speci.cation at best approaches that of the standard model, but does not improve upon it. We conclude that inventories do not play a role in explaining in.ation dynamics within our New Keynesian Phillips curve framework.

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Paper provided by University of Nottingham, Centre for Finance, Credit and Macroeconomics (CFCM) in its series Discussion Papers with number 10/02.

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Handle: RePEc:not:notcfc:10/02
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  1. Krause, Michael U. & Lopez-Salido, David J. & Lubik, Thomas A., 2008. "Do search frictions matter for inflation dynamics?," European Economic Review, Elsevier, vol. 52(8), pages 1464-1479, November.
  2. Susanto Basu & John G. Fernald, 1996. "Returns to scale in U.S. production: estimates and implications," International Finance Discussion Papers 546, Board of Governors of the Federal Reserve System (U.S.).
  3. Margaret M. McConnell & Gabriel Perez Quiros, 1998. "Output fluctuations in the United States: what has changed since the early 1980s?," Staff Reports 41, Federal Reserve Bank of New York.
  4. Thomas Lubik & Frank Schorfheide, 2002. "Testing for Indeterminacy:An Application to U.S. Monetary Policy," Economics Working Paper Archive 480, The Johns Hopkins University,Department of Economics, revised Jun 2003.
  5. Mark Bils & James Kahn, 1998. "What inventory behavior tells us about business cycles," Research Paper 9817, Federal Reserve Bank of New York.
  6. Krause, Michael U. & Lopez-Salido, David & Lubik, Thomas A., 2008. "Inflation dynamics with search frictions: A structural econometric analysis," Journal of Monetary Economics, Elsevier, vol. 55(5), pages 892-916, July.
  7. Martin Boileau & Marc-Andre Letendre, 2011. "Inventories, sticky prices, and the persistence of output and inflation," Applied Economics, Taylor & Francis Journals, vol. 43(10), pages 1161-1174.
  8. repec:tpr:qjecon:v:107:y:1992:i:2:p:481-510 is not listed on IDEAS
  9. Jordi Gali & Mark Gertler, 2000. "Inflation Dynamics: A Structural Econometric Analysis," NBER Working Papers 7551, National Bureau of Economic Research, Inc.
  10. Thomas A. Lubik & Wing Leong Teo, 2010. "Inventories and Optimal Monetary Policy," CAMA Working Papers 2010-07, Centre for Applied Macroeconomic Analysis, Crawford School of Public Policy, The Australian National University.
  11. Krause, M.U. & Lubik, T.A., 2003. "The (Ir)relevance of Real Wage Rigidity in the New Keynesian Model with Search Frictions," Discussion Paper 2003-113, Tilburg University, Center for Economic Research.
  12. Aubhik Khan & Julia K. Thomas, 2003. "Inventories and the business cycle: an equilibrium analysis of (S,s) policies," Staff Report 329, Federal Reserve Bank of Minneapolis.
  13. Oleksiy Kryvtsov & Virgiliu Midrigan, 2009. "Inventories, Markups, and Real Rigidities in Menu Cost Models," NBER Working Papers 14651, National Bureau of Economic Research, Inc.
  14. Kahn, James A, 1987. "Inventories and the Volatility of Production," American Economic Review, American Economic Association, vol. 77(4), pages 667-79, September.
  15. Oleksiy Kryvtsov & Virgiliu Midrigan, 2009. "Inventories and Real Rigidities in New Keynesian Business Cycle Models," Staff Working Papers 09-9, Bank of Canada.
  16. Chang, Yongsung & Hornstein, Andreas & Sarte, Pierre-Daniel, 2009. "On the employment effects of productivity shocks: The role of inventories, demand elasticity, and sticky prices," Journal of Monetary Economics, Elsevier, vol. 56(3), pages 328-343, April.
  17. James M. Nason & Gregor W. Smith, 2008. "The New Keynesian Phillips curve : lessons from single-equation econometric estimation," Economic Quarterly, Federal Reserve Bank of Richmond, issue Fall, pages 361-395.
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