We study a labour market in which firms can observe workers’ output but not their effort, and in which a worker’s productivity in a given firm depends on a worker-firm specific component, unobservable for the firm. Firms offer wage contracts that optimally trade off effort and wage costs. As...

We analyse the efficiency of the labour market outcome in a competitive search equilibrium model with endogenous turnover and endogenous general human capital formation. We show that search frictions do not distort training decisions if firms and their employees are able to coordinate...

This paper examines competitive search equilibrium when workers' effort choice and 'type' are private information. We derive a modified Hosios Rule determining the allocation of resources, and analyze how private information influences the responsiveness of the unemployment rate to changes in...