This study derives and estimates a dynamic model of factor demand that includes both fixed and quadratic variable costs of adjustment. Using quarterly data on the employment of mechanics at seven airlines, it finds that both types of adjustment costs characterize the dynamic constraints facing employers. Using monthly data covering production-worker employment in seven manufacturing plants, it shows that only fixed costs are important. The apparent diversity of the underlying costs of adjustment means it is difficult to draw useful inferences from macroeconometric estimates. It suggests the importance of examining broader arrays of microeconomic time series describing labor demand.

To deter entry into new product markets, firms most often use the creation of product loyalty through advertising and the preemption of markets through numerous and broad patents. Filling all product niches, making the results for highly profitable division, and advertising are used most frequently for existing products. For newly developed products, strategic entry deterrents are used more often when markets are concentrated, populated by large firms, and research intensive. Strategic entry deterrents for existing products are used in concentrated, research intensive markets, but firm size has no effect. Firms develop strategies to deter entry less when other barriers exist.

Thomas P. Frazier, Matthew S. Goldberg, Thomas R. Gulledge, Jr., Department of Defense Profit Policy and Capital Investment in the Military Aircraft Industry, The Review of Economics and Statistics, Vol. 74, No. 3 (Aug., 1992), pp. 394-403

The growth of employee benefits in academe has closely paralleled their economy-wide growth. This study estimates a complete system describing the demand for benefits and wages using panel data on 1477 institutions of higher learning. the demand for benefits is very responsive to changes in real income and the tax price of benefits. These conclusions are robust with respect to varying definitions of the tax price, treating it as endogenous, and accounting for unmeasured individual effects on demand. Simulations suggest that the Tax Reform Act of 1986 sharply reduced the demand for benefits. Extrapolating the impact to the entire economy, the annual flow of compensation shifted away from benefits by at least $15 billion.