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α: calibrated so average coauthorship-adjusted count equals average raw count
The countercyclical pattern of inventory-sales ratios is a striking feature of inventory behavior. In a model where inventories are productive for sales, both the markup of price over marginal cost and expected changes in marginal cost are key determinants of that ratio. This paper argues that costly variation in factor utilization gives rise to countercyclical markups in production-to-stock manufacturing industries. Time markup turns out to be more important than intertemporal substitution in explaining the behavior of inventory-sales ratios.