This paper presents the case for tax progressivity based on recent results in optimal tax theory. We consider the optimal progressivity of earnings taxation and whether capital income should be taxed. We critically discuss the academic research on these topics and when and how the results can be...

In the last decade, behavioral economics, borrowing from psychology and sociology to explain decisions inconsistent with traditional economics, has revolutionized the way economists view the world. But despite this general success, behavioral thinking has fundamentally transformed only one field...