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Idiosyncratic shocks and the role of nonconvexities in plant and aggregate investment dynamics

Author: Aubhik Khan; Julia K Thomas; National Bureau of Economic Research.
Publisher: Cambridge, Mass. : National Bureau of Economic Research, 2007.
Series: Working paper series (National Bureau of Economic Research), no. 12845.
Edition/Format:   eBook : Document : EnglishView all editions and formats
Summary:
"We study a model of lumpy investment wherein establishments face persistent shocks to common and plant-specific productivity, and nonconvex adjustment costs lead them to pursue generalized (S, s) investment rules. We allow persistent heterogeneity in both capital and total factor productivity alongside low-level investments exempt from adjustment costs to develop the first model consistent with available evidence  Read more...
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Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Aubhik Khan; Julia K Thomas; National Bureau of Economic Research.
OCLC Number: 78932574
Description: 1 online resource (1 volume).
Series Title: Working paper series (National Bureau of Economic Research), no. 12845.
Responsibility: Aubhik Khan, Julia Thomas.

Abstract:

"We study a model of lumpy investment wherein establishments face persistent shocks to common and plant-specific productivity, and nonconvex adjustment costs lead them to pursue generalized (S, s) investment rules. We allow persistent heterogeneity in both capital and total factor productivity alongside low-level investments exempt from adjustment costs to develop the first model consistent with available evidence on establishment-level investment rates. Examining the implications of lumpy investment for aggregate dynamics in this setting, we find that they remain substantial when factor supply considerations are ignored, but are quantitatively irrelevant in general equilibrium. The substantial implications of general equilibrium extend beyond the dynamics of aggregate series. While the presence of idiosyncratic shocks makes the time-averaged distribution of plant-level investment rates largely invariant to market-clearing movements in real wages and interest rates, we show that the dynamics of plants' investments differ sharply in their presence. Thus, model-based estimations of capital adjustment costs involving panel data may be quite sensitive to the assumption about equilibrium. Our analysis also offers new insights about how nonconvex adjustment costs influence investment at the plant. When establishments face idiosyncratic productivity shocks consistent with existing estimates, we find that nonconvex costs do not cause lumpy investments, but act to eliminate them"--NBER website.

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