It is argued that aggregating information on deprivations into one index is inherently problematic in terms of weighting and for the risk of masking deprivations in particular dimensions with the performance of the other dimensions included in the index. Most of these comments are addressed within other parts of the MODA methodology (i.e., the single deprivation analysis and the overlap analysis). Moreover, the indices used in the MODA studies allow comparing outcomes between countries, regions and population groups in order to profile children and their families belonging to various groups of the population. Following Alkire and Foster (2011a), the adjusted headcount is decomposed to answer such questions as 'What is the contribution of specific population groups to the total deprivation level?'