This paper contributes to the debate about the optimal design of tax-transfer systems. Basedon the theory of optimal taxation, combined with microsimulation and microeconometrictechniques we derive the welfare function which makes the current German tax and transfersystem for single women optimal...

In labor markets with worker and firm heterogeneity, the matching between firms and workersmay be assortative, meaning that the most productive workers and firms team up. Weinvestigate this with longitudinal population-wide matched employer-employee data fromPortugal...