Since July 2004 the job search effort of long-term unemployed benefit claimants is monitored in Belgium. We develop a structural approach to evaluate the impact of the reform on the exit rate to employment and on earnings. A job-search model is built and then estimated on the basis of a sample...

This paper characterizes the optimal redistributive taxation when individuals are hetero- geneous in two exogenous dimensions: their skills and their values of non-market activities. Search-matching frictions on the labor markets create unemployment. Wages, labor demand and participation are...

This paper characterizes optimal non-linear income taxation in an economy with a continuum of unobservable productivity levels and endogenous involuntary unemployment due to frictions in the labour markets. Redistributive taxation distorts labour demand and wages. Compared to their efficient...

This paper argues that, for a given overall level of labour income taxation, a more progressive tax schedule reduces the unemployment rate and increases the employment rate. From a theoretical point of view, higher progressivity induces a wage-moderation e ect and increases overall employment...

This paper characterizes the optimal redistributive tax schedule in a matching unemployment framework where (voluntary) nonparticipation and (involuntary) un- employment are endogenous. The optimal employment tax rate is given by an inverse employment elasticity rule. This rule depends on the...

We develop a methodology to sign output distortions in the random participation framework. We apply our method to monopoly nonlinear pricing problem, to the regulatory monopoly problem and mainly to the optimal income tax problem. In the latter framework, individuals are heterogeneous across two...