This discussion paper resulted in a publication in <I>Econometrica</I> (2001). Volume 69, issue 6, pages 1645-1659.<P> With panel data important issues can be resolved that can not beaddressed with cross--sectional data. A major drawback is that paneldata suffer from more severe missing data problems....</p></i>

With panel data important issues can be resolved that can not be addressed with cross--sectional data. A major drawback is that panel data suffer from more severe missing data problems. Adding a sample consisting of new units randomly drawn from the original population as replacements for units...

This discussion paper resulted in a publication in the <I>Journal of Applied Econometrics</I> (2000). Volume 15, issue 6, pages 547-574.<P> We analyze the impact of unemployment benefits and minimum wagesusing an equilibrium search model which allows for dispersion ofbenefits and productivity levels,...</p></i>

We show that a sufficient condition for the identification ofall parameters of the censored regression model with astochastic and unobserved threshold is that the errors are jointlynormally distributed. Exclusion restrictions are not needed.

This discussion paper led to a publication in the <I>Journal of Econometrics</I> (2005). Volume 125, issue 1-2, pages 77-111.

The simplest equilibrium search models depend on a few parameters that determine the joint distribution of unemployment spells, job spells, and wages. In this study we use aggregate data to estimate these key parameters for five OECD countries: (West-)Germany, The Netherlands, France, the United...

We show that a sufficient condition for the identification of all parameters of the censored regression model with a stochastic and unobserved threshold is that the errors are jointly normally distributed. Exclusion restrictions are not needed. <BR><BR>

We analyze the impact of unemployment benefits and minimum wages using an equilibrium search model which allows for dispersion of benefits and productivity levels, job-to-job transitions, and structural and frictional unemployment. The estimation method uses readily available aggregate data on...

On the basis of the baseline data collected for the evaluation of the Bolivian Social Investment Fund (SIF) this paper assesses (1) the benefit incidence of the SIF and (2) the quality of the evaluation design. We find that the benefits in education are most equally distributed over the...

This paper analyzes the determinants of lay-offs, job-to-job movements and total separations with a unique data set that combines information on individual firms and their workers. We are in particular interested in whether the lay-off policy of firms can explain the relatively high level of...