To assess the impact of tax-benefit policy changes on income distribution over time, wesuggest a methodology based on counterfactual simulations. We start by decomposingchanges in inequality/poverty indices into three contributions: reforms of the tax-benefitstructure (rules, rates, etc.),...

Both raw intuition and past experience suggest that the success of an employment guaranteescheme (EGS) in safeguarding the welfare of the poor depends both on the wage itpromises, and the ease with which any worker can gain access. An EGS is thus at once awage guarantee and a rationing device....

In many countries, non-compliance with minimum wage legislation is widespread, andauthorities may be seen as having turned a blind eye to a legislation that they havethemselves passed. But if enforcement is imperfect, how effective can a minimum wage be?And if non-compliance is widespread, why...

The Polish tax and benefit system is presented in the context of a recently developedmicrosimulation model, SIMPL. The model allows simulating direct taxes, social contributionsand public benefits in Poland for the years 2003 and 2005...>br>