In 2011, the Gini index, a commonly used measure of inequality, was equal to 0.341, about 2.6 percentage points above the OECD average of 0.315 (Figure 2.1). Using other inequality measures that give more weight to the tails of the income distribution than the Gini index, Portugal also stands out as one of the most unequal countries in Europe. Gini coefficient is calculated for household disposable income after taxes and transfers, adjusted for differences in household size.