In this article we show that technological parameter estimates obtained by estimating a cost function that is derivable as the dual of a production function can be biased and inconsistent if the stochastic structure of the model arises from certain types of behavioural assumptions made about...

Using Danish register and survey data, we examine the effect of a national graded return-to-work program on the probability of sick-listed workers returning to regular working hours. During program participation, the worker receives the normal hourly wage for the hours worked and sickness...

Using data from a sample of households in 1994 we find that Danish household labour allocation choices are best described by a collective model in which decisions are made cooperatively. Individual preferences are similar but there are important differences due to the differences in educational...