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Inventories, Inflation Dynamics and the New Keynesian Phillips Curve

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  • Thomas A. Lubik
  • Wing Leong Teo

Abstract

We introduce inventories into an otherwise standard New Keynesian model and study the implications for inflation dynamics. Inventory holdings are motivated as a means to generate sales for demand-constrained firms. We derive various representations of the New Keynesian Phillips curve with inventories and show that one of these specifications is observationally equivalent to the standard model with respect to the behavior of inflation when the model’s cross-equation restrictions are imposed. However, 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 specifications of the New Keynesian Phillips curve using GMM. We find that predictive power of the inventory-specification 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 inflation dynamics within our New Keynesian Phillips curve framework.

Suggested Citation

  • Thomas A. Lubik & Wing Leong Teo, 2010. "Inventories, Inflation Dynamics and the New Keynesian Phillips Curve," CAMA Working Papers 2010-13, Centre for Applied Macroeconomic Analysis, Crawford School of Public Policy, The Australian National University.
    • Handle: RePEc:een:camaaa:2010-13
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    References listed on IDEAS

    as
    1. Thomas A. Lubik & Wing Leong Teo, 2009. "Inventories and optimal monetary policy," Economic Quarterly, Federal Reserve Bank of Richmond, vol. 95(Fall), pages 357-382.
    2. Oleksiy Kryvtsov & Virgiliu Midrigan, 2013. "Inventories, Markups, and Real Rigidities in Menu Cost Models," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 80(1), pages 249-276.
    3. Oleksiy Kryvtsov & Virgiliu Midrigan, 2010. "Inventories and Real Rigidities in New Keynesian Business Cycle Models," NBER Chapters, in: Sticky Prices and Inflation Dynamics (NBER-TCER-CEPR), pages 259-281, National Bureau of Economic Research, Inc.
    4. 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.
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    7. Krause, Michael U. & Lubik, Thomas A., 2007. "The (ir)relevance of real wage rigidity in the New Keynesian model with search frictions," Journal of Monetary Economics, Elsevier, vol. 54(3), pages 706-727, April.
    8. 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.
    9. 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.
    10. 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.
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    12. 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.
    13. Margaret M. McConnell & Gabriel Perez-Quiros, 2000. "Output fluctuations in the United States: what has changed since the early 1980s?," Proceedings, Federal Reserve Bank of San Francisco, issue Mar.
    14. Gali, Jordi & Gertler, Mark, 1999. "Inflation dynamics: A structural econometric analysis," Journal of Monetary Economics, Elsevier, vol. 44(2), pages 195-222, October.
    15. Kahn, James A, 1987. "Inventories and the Volatility of Production," American Economic Review, American Economic Association, vol. 77(4), pages 667-679, September.
    16. 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, vol. 94(Fall), pages 361-395.
    17. 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.
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    Cited by:

    1. Görtz, Christoph & Gunn, Christopher & Lubik, Thomas A., 2022. "Is there news in inventories?," Journal of Monetary Economics, Elsevier, vol. 126(C), pages 87-104.
    2. Sedjro Aaron Alovokpinhou & Christopher Malikane & Tshepo Mokoka, 2022. "Inventory dynamics and endogenous persistence in a new Keynesian model," Applied Economics, Taylor & Francis Journals, vol. 54(17), pages 1957-1973, April.
    3. Christoph Görtz & Christopher Gunn & Thomas Lubik, "undated". "What Drives Inventory Accumulation? News on Rates of Return and Marginal Costs," Carleton Economic Papers 19-09, Carleton University, Department of Economics.
    4. Thomas A. Lubik & Wing Leong Teo, 2014. "Deep Habits in the New Keynesian Phillips Curve," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 46(1), pages 79-114, February.
    5. Alovokpinhou, Sedjro Aaron & Malikane, Christopher, 2024. "The effect of output and the real exchange rate on equity price dynamics," The North American Journal of Economics and Finance, Elsevier, vol. 72(C).
    6. 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.
    7. Bratsiotis, George J. & Robinson, Wayne A., 2016. "Unit Total Costs: An Alternative Marginal Cost Proxy For Inflation Dynamics," Macroeconomic Dynamics, Cambridge University Press, vol. 20(7), pages 1826-1849, October.
    8. Charles Ka Yui Leung & Edward Chi Ho Tang, 2023. "The dynamics of the house price‐to‐income ratio: Theory and evidence," Contemporary Economic Policy, Western Economic Association International, vol. 41(1), pages 61-78, January.
    9. Thomas A. Lubik & Wing Leong Teo, 2009. "Inventories and optimal monetary policy," Economic Quarterly, Federal Reserve Bank of Richmond, vol. 95(Fall), pages 357-382.
    10. Christoph Görtz & Christopher Gunn & Thomas Lubik, 2018. "Taking Stock of TFP News Shocks: The Inventory Comovement Puzzle," Carleton Economic Papers 18-05, Carleton University, Department of Economics, revised 14 Jul 2018.
    11. Christoph Görtz & Christopher Gunn & Thomas A. Lubik, 2024. "The Changing Nature of Technology Shocks," CESifo Working Paper Series 11385, CESifo.
    12. 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).

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    More about this item

    JEL classification:

    • E24 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Employment; Unemployment; Wages; Intergenerational Income Distribution; Aggregate Human Capital; Aggregate Labor Productivity
    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
    • J64 - Labor and Demographic Economics - - Mobility, Unemployment, Vacancies, and Immigrant Workers - - - Unemployment: Models, Duration, Incidence, and Job Search

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