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When Do Inventories Destabilize the Economy? ---A Tractable Approach to (S,s) Policies

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  • Zhiwei Xu

    (Hong Kong University of Science and Technology)

  • Yi Wen
  • pengfei Wang

    (Hong Kong University of Science and Technology)

Abstract

This paper provides a method to analytically (or tractably) solve (S,s) inventory policies in general equilibrium. This solution method can handle large state space with many state variables, such as multiple capital stocks, lagged aggregate investment and consumption, and other predetermined aggregate variables, thus greatly reducing the computation costs of DSGE models with inventories. We use the Khan-Thomas (2007) model to illustrate how standard log-linearization methods can be used to solve various versions of this inventory model and generate impulse response functions. We find that the conventional wisdom that inventory investment destabilizes the economy can still hold in general-equilibrium if firms face investment adjustment costs or can vary the capacity utilization rate.

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Bibliographic Info

Paper provided by Society for Economic Dynamics in its series 2012 Meeting Papers with number 288.

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Date of creation: 2012
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Handle: RePEc:red:sed012:288

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  23. Caplin, Andrew S, 1985. "The Variability of Aggregate Demand with (S, s) Inventory Policies," Econometrica, Econometric Society, vol. 53(6), pages 1395-1409, November.
  24. Ramey, Valerie A, 1991. "Nonconvex Costs and the Behavior of Inventories," Journal of Political Economy, University of Chicago Press, vol. 99(2), pages 306-34, April.
  25. 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.
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