We show in a two-period world with endogenous savings and two assets, one of them exhibiting a stochastic return, that an interest-adjusted income tax is optimal. This tax leaves a riskless component of interest income tax free and taxes the excess return with a special tax rate. There is no...

The main driver of inequality--returns on capital that exceed the rate of economic growth--is again threatening to generate extreme discontent and undermine democratic values. Thomas Piketty`s findings in this ambitious, original, rigorous work will transform debate and set the agenda for the...