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What inventories tell us about aggregate fluctuations -- a tractable approach to (S,s) policies

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  • Yi Pengfei Wang
  • Wen
  • Zhiwei Xu

Abstract

We estimate a DSGE model with (S,s) inventory policies. We find that (i) taking inventories into account can significantly improve the empirical fit of DSGE models in matching the standard business-cycle moments (in addition to explaining inventory fluctuations); (ii) (S,s) inventory policies can significantly amplify aggregate output fluctuations, in contrast to the findings of the recent general-equilibrium inventory literature; and (iii) aggregate demand shocks become more important than technol- ogy shocks in explaining the business cycle once inventories are incorporated into the model. An independent contribution of our paper is that we develop a solution method for analytically solving (S,s) inventory policies in general-equilibrium models with het- erogeneous firms and a large aggregate state space, and we illustrate how standard log-linearization methods can be used to solve various versions of our inventory model, generate impulse response functions, and estimate the model’s deep structural para- meters.

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Bibliographic Info

Paper provided by Federal Reserve Bank of St. Louis in its series Working Papers with number 2012-059.

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Date of creation: 2012
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Handle: RePEc:fip:fedlwp:2012-059

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Keywords: Inventories;

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  1. 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.
  2. Wen, Yi, 2002. "What Does It Take to Explain Procyclical Productivity," Working Papers 02-14, Cornell University, Center for Analytic Economics.
  3. Yi Wen, 2011. "Input and Output Inventory Dynamics," American Economic Journal: Macroeconomics, American Economic Association, vol. 3(4), pages 181-212, October.
  4. Robert G. King & Julia K. Thomas, . "Partial Adjustment without Apology," GSIA Working Papers 1999-E12, Carnegie Mellon University, Tepper School of Business.
  5. Jonas D.M. Fisher & Andreas Hornstein, 1996. "(S, s) inventory policies in general equilibrium," Working Paper Series, Macroeconomic Issues WP-96-24, Federal Reserve Bank of Chicago.
  6. Julia K. Thomas, 2002. "Is lumpy investment relevant for the business cycle?," Staff Report 302, Federal Reserve Bank of Minneapolis.
  7. Per Krusell & Anthony A. Smith & Jr., 1998. "Income and Wealth Heterogeneity in the Macroeconomy," Journal of Political Economy, University of Chicago Press, vol. 106(5), pages 867-896, October.
  8. Lee, Bong-Soo & Ingram, Beth Fisher, 1991. "Simulation estimation of time-series models," Journal of Econometrics, Elsevier, vol. 47(2-3), pages 197-205, February.
  9. Alan S. Blinder & Louis J. Maccini, 1991. "Taking Stock: A Critical Assessment of Recent Research on Inventories," Journal of Economic Perspectives, American Economic Association, vol. 5(1), pages 73-96, Winter.
  10. Wen, Yi, 1998. "Capacity Utilization under Increasing Returns to Scale," Journal of Economic Theory, Elsevier, vol. 81(1), pages 7-36, July.
  11. Michael Dotsey & Robert G. King & Alexander L. Wolman, 1999. "State-Dependent Pricing And The General Equilibrium Dynamics Of Money And Output," The Quarterly Journal of Economics, MIT Press, vol. 114(2), pages 655-690, May.
  12. Caplin, Andrew S, 1985. "The Variability of Aggregate Demand with (S, s) Inventory Policies," Econometrica, Econometric Society, vol. 53(6), pages 1395-1409, November.
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