Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Inventory investment is positively correlated with changes in production and follows the latter with a time-lag of two to three quarters. Therefore, there is no evidence that inventory investment either drives or smoothes the business cycle. Very few countries -Austria, Greece, Spain, and Switzerland -diverge from the typical pattern. This might hint to problems with respect to data quality.
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Keywords:Inventory investment, production, business cycle, "Great Recession" in Europe
IntroductionResearch on inventory investment can be sorted along the micro-macro divide or along the theory-empirics divide. Theoretical research is usually microeconomic in nature and integrates inventory investment into the firm's profit-maximization calculus. Two main theory blocks have ensued from this strand of the literature: the production-smoothing model and the (S, s) inventory model (see Blinder and Maccini, 1991, Hornstein, 1998, Ramey and West, 1999. The production smoothing model starts from the assumptions that production is subject to increasing marginal cost and that firms are facing exogenous demand shocks. In this case, firms minimize cost by smoothing production. Hence, this theory predicts production to be less volatile than sales, and inventory investment should be negatively correlated with sales.The (S, s) inventory theory assumes that firms holding inventories are non-producing firms that order goods from producers. The ordering firm faces a trade-off between the reduced perunit order cost of increasing order sizes and the foregone interest income of the higher funds needed to pay for larger order sizes. The optimal strategy is then to place an order whenever the level of inventories falls below a critical level s. The order lifts inventories to level S from which sales will reduce it again to level s and so on. If orders are equal to production it follows from this theory that production will be more volatile than sales.The second strand of the literature is concerned with the empirics of inventory investment and is predominantly macroeconomic in nature. It asks which patterns between inventory investment, production, and sales can be found in the data. This research has uncovered a number of -as Ramey and West (
3That production is more volatile than sales speaks against the production-smoothing model, although Fair (1989) and Krane and Braun (1991) claim to be able to vindicate the latter showing that production is...