We present a new method for imposing and testing concavity of a cost function using asymptotic least squares, which can easily be implemented even for cost functions which are nonlinear in parameters. We provide an illustration on the basis of a (generalized) Box-Cox cost function with six...

In this paper we describe the compiling of the integrated data which comprises longitudinal information on Finnish companies and workers. The company panel of the data is dynamically representative over time and covers a wide range of the economy. The worker panel covers in principle all people...

Employment of apprentices seems to follow the business cycle. An interesting question is whether this is based on an investment policy where firms recruit when the labour market indicates skill shortage. Alternatively it may be that the firms are myopic and basically hire apprentices in booming...

The continuous innovation process experienced by the information technology industries over the last decades has caused the price of computer power to decrease dramatically. This has led many firms to invest massively in increasingly efficient computers. This paper is an attempt to assess the...

This paper provides the first empirical evidence for Mexico about relative wage dif ferences between college-educated and high-school-educated workers across five-year age groups. Rotating panel surveys are used to implement an imperfect substitution model for similar male workers between dif...

This paper provides an analysis of the effects of attrition and non-response on employment and wages using the Canadian Survey of Labour and Income Dynamics. We consider a structural model composed of three freely correlated equations for non-attrition/response, employment and wages. The model...