The paper discusses the recent drive towards a system of dual income taxation (DIT) in the Nordic countries. The pure version of this system combines progressive taxation of labour and transfer incomes with a proportional tax on income from capital at a level equal to the corporate income tax...

This paper provides an efficiency argument in favour of progressive labour income taxation. When the consumer faces a trade-off between investments in financial and human capital, a proportional comprehensive income tax tends to discriminate in favour of human capital investments. This effect is...