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Interpreting the Great Moderation: Changes in the Volatility of Economic Activity at the Macro and Micro Levels

Steven Davis () and James Kahn ()

No 14048, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: We review evidence on the Great Moderation in conjunction with evidence about volatility trends at the micro level. We combine the two types of evidence to develop a tentative story for important components of the aggregate volatility decline and its consequences. The key ingredients are declines in firm-level volatility and aggregate volatility -- most dramatically in the durable goods sector -- but the absence of a decline in household consumption volatility and individual earnings uncertainty. Our explanation for the aggregate volatility decline stresses improved supply-chain management, particularly in the durable goods sector, and, less important, a shift in production and employment from goods to services. We provide evidence that better inventory control made a substantial contribution to declines in firm-level and aggregate volatility. Consistent with this view, if we look past the turbulent 1970s and early 1980s much of the moderation reflects a decline in high frequency (short-term) fluctuations. While these developments represent efficiency gains, they do not imply (nor is there evidence for) a reduction in economic uncertainty faced by individuals and households.

JEL-codes: E32 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-bec and nep-mac
Date: 2008-05
Note: EFG
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Published as Steven J. Davis & James A. Kahn, 2008. "Interpreting the Great Moderation: Changes in the Volatility of Economic Activity at the Macro and Micro Levels," Journal of Economic Perspectives, American Economic Association, vol. 22(4), pages 155-80, Fall.

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Journal Article: Interpreting the Great Moderation: Changes in the Volatility of Economic Activity at the Macro and Micro Levels (2008) Downloads
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