In recent years, a small but growing literature concerned with the empirical analysis of the workings of internal labour markets has emerged. These studies, which have almost exclusively been based on personnel records data from single firms, notably Lazear (1992) and Baker, Gibbs and Holmström...

Estimates of the structural parameters of a job separation model derived from the theory of on-the-job search are reported in this paper. Given that each employer pays the same wage to observably equivalent workers but wages are dispersed across employers, the theory implies that an employer's...