Abstract

Aggregate inventory investment is invariably procyclical. This suggests that inventories play a destabilizing role in the economy as predicted by early Keynesian models of the business cycle. However, this behavior is believed to be inconsistent with the most prominent micro theory of inventories – the linear quadratic model. This is not the case. The linear quadratic model, when placed in a simple macro framework, can account for the procyclical behavior of inventory investment, even when the only shocks are independent demand shocks, inventory targets are independent of sales and individual firms adjust inventories slowly towards their target levels.

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