“…43 Employees' social SSC are also covered by the redistribution measure but they are not the focus here because : i) their redistributive effect is negligible, in fact in some countries they tend to be regressive (Causa and Hermansen, 2017), ii) a proper analysis of income redistribution through SSC should take into account both employers and employees SSC which is not possible with the redistribution measure at-hand, and, finally iii) a life-cycle perspective would ideally better uncover redistribution through SSC. 44 See Akgun et al (2017) for an analysis on the effect of the tax mix on disposable income inequality. 45 In theory, the progressivity of the whole tax system should be assessed but in practice only PIT (and SSC) progressivity measures are available.…”