Both the tax mix and the progressive nature of taxes raise the redistributive impact of taxes. The data contained in the OECD Income Distribution and Poverty Database further reveal that household taxes are more progressive - as measured by a Kakwani index - than in the OECD on average. So are the personal income tax and social security contributions paid by employees (based on statutory tax schedules from the OECD Tax Database), in particular at the lower end of the income distribution.