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Inventories, Inflation Dynamics and the New Keynesian Phillips Curve

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  • Thomas A Lubik
  • Wing Teong Teo

Abstract

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. 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.
  2. 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.
  3. Kryvtsov, Oleksiy & Midrigan, Virgiliu, 2010. "Inventories and real rigidities in New Keynesian business cycle models," Journal of the Japanese and International Economies, Elsevier, vol. 24(2), pages 259-281, June.
  4. Thomas Lubik & Michael Krause, 2003. "The (Ir)relevance of Real Wage Rigidity in the New Keynesian Model with Search Frictions," Economics Working Paper Archive 504, The Johns Hopkins University,Department of Economics.
  5. James A. Kahn & Mark Bils, 2000. "What Inventory Behavior Tells Us about Business Cycles," American Economic Review, American Economic Association, vol. 90(3), pages 458-481, June.
  6. Jordi Gali & Mark Gertler, 2000. "Inflation Dynamics: A Structural Econometric Analysis," NBER Working Papers 7551, National Bureau of Economic Research, Inc.
  7. 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.
  8. Basu, Susanto & Fernald, John G, 1997. "Returns to Scale in U.S. Production: Estimates and Implications," Journal of Political Economy, University of Chicago Press, vol. 105(2), pages 249-83, April.
  9. 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.
  10. 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.
  11. Kahn, James A, 1992. "Why Is Production More Volatile Than Sales? Theory and Evidence on the Stockout-Avoidance Motive for Inventory-Holding," The Quarterly Journal of Economics, MIT Press, vol. 107(2), pages 481-510, May.
  12. 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.
  13. Michael U. Krause & Thomas A. Lubik & David López-Salido, 2008. "Inflation dynamics with search frictions : a structural econometric analysis," Working Paper 08-01, Federal Reserve Bank of Richmond.
  14. Thomas A. Lubik & Wing Leong Teo, 2009. "Inventories and optimal monetary policy," Economic Quarterly, Federal Reserve Bank of Richmond, issue Fall, pages 357-382.
  15. Aubhik Khan & Julia K. Thomas, 2007. "Inventories and the Business Cycle: An Equilibrium Analysis of ( S, s ) Policies," American Economic Review, American Economic Association, vol. 97(4), pages 1165-1188, September.
  16. Kahn, James A, 1987. "Inventories and the Volatility of Production," American Economic Review, American Economic Association, vol. 77(4), pages 667-79, September.
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Cited by:
  1. 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.
  2. Thomas A. Lubik & Wing Leong Teo, 2012. "Deep Habits in the New Keynesian Phillips Curve," CAMA Working Papers 2012-09, Centre for Applied Macroeconomic Analysis, Crawford School of Public Policy, The Australian National University.
  3. Marcel Förster, 2014. "An Empirical Analysis of Business Cycles in a New Keynesian Model with Inventories," MAGKS Papers on Economics 201413, Philipps-Universität Marburg, Faculty of Business Administration and Economics, Department of Economics (Volkswirtschaftliche Abteilung).
  4. Teo, Wing Leong, 2011. "Inventories and optimal monetary policy in a small open economy," Journal of International Money and Finance, Elsevier, vol. 30(8), pages 1719-1748.

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