The redistributive and efficiency aspects of personal taxes are of particular interest to both economists and governments designing tax reforms. Traditionally however, the numerous analytical tools available to calculate distributional and efficiency effects of taxes and transfers are not widely...

This paper studies optimal linear income taxation and redistributive social insurance when the former has the traditional labor distortion and the latter generates both ex ante and ex post moral hazard. Private insurance is available and individuals differ in labor productivity and in loss...

The paper provides a new formulation of the Mirrlees-Seade theo- rem on the positivity of the optimal marginal income tax, under weaker assumptions and in a more general model. The formulation of the the- orem is independent of whether the model involves finitely many types or a continuous type...

The paper provides a new proof of the positivity of the optimal marginal income tax, in a more general model, under weaker assumptions. The analysis focusses on the (weakly) relaxed problem in which upward incentive constraints are replaced by a monotonicity condition on consumption. Without...

Im Vorfeld der Bundestagswahl 2013 findet in Deutschland eine intensive Debatte über die Umverteilungswirkung der Einkommensteuer statt. Insbesondere mit der Senkung des Spitzensteuersatzes auf zwischenzeitlich 42 und nun 45 Prozent wird eine überproportionale Bevorzugung hoher Einkommen...

The paper provides an equilibrium analysis of how countries compete for migrants. The type of competition (tax or transfer competition) depends on whether the competing countries have similar policy preferences. With symmetric preferences, countries compete in taxes for migrants. With asymmetric...