RT Journal Article T1 Input cost, capacity utilization and substitution in the short run A1 Delgado, Miguel A. A1 Jaumandreu, Jordi A1 Martín Marcos, Ana AB This article studies the behavior of input cost shares in an environment where labor is costly to adjust, materials can be adjusted at no cost and capital is fixed. A model relating cost shares with relative prices and adjustment costs is proposed, allowing joint estimation of the elasticity of substitution and the adjustment cost function, which is an unknown function of the capacity utilization. Based on a panel of more than 700 manufacturing firms, we find evidence of strong input share variations according to the degree of capacity utilization. The estimated shapes of adjustment costs curves of labor are in agreement with our theoretical model, and we obtain sensible elasticities of substitution estimates. Based on such estimates, we find evidence of a negative (positive) bias in downturns (recoveries) in conventional productivity growth measures. PB Springer SN 1435-5477 YR 1999 FD 1999 LK https://hdl.handle.net/10016/2444 UL https://hdl.handle.net/10016/2444 LA eng DS e-Archivo RD 20 may. 2024