TY - JOUR AU - Hamermesh,Daniel S. AU - Pfann,Gerard TI - Turnover and the Dynamics of Labor Demand JF - National Bureau of Economic Research Working Paper Series VL - No. 4204 PY - 1992 Y2 - October 1992 UR - http://www.nber.org/papers/w4204 L1 - http://www.nber.org/papers/w4204.pdf N1 - Author contact info: Daniel S. Hamermesh Department of Economics University of Texas Austin, TX 78712-1173 Tel: 512/475-8526 Fax: 512/471-3510 E-Mail: hamermes@eco.utexas.edu Gerard A.. Pfann Faculty of Quantitative Economics Maastricht University Maastricht, THE NETHERLANDS E-Mail: g.pfann@maastrichtuniversity.nl AB - The theory of the dynamics of labor demand is based either on the costs of adjusting the level of employment or on the costs of hiring or firing (of gross changes in employment). We write down a generalized cost of adjustment function that includes both types of cost and allows for asymmetries in those costs. We derive the firm's rational-expectations profit - maximizing path of employment demand and the Euler equation whose parameters we estimate. Identifying the two types of costs requires complete data on turnover, which were available for the U.S. through 1981. We use these data for manufacturing to demonstrate that both types of adjustment cost figure in the representative firm's profit-maximizing decisions about employment, and that both types of cost are asymmetric (leading here to quicker increases than decreases in employment). ER -