Left: PDSMFs of the Pleiades (derived here for J, H, K_s bands), Trapezium, and Hyades, from Bouy et al. (2015b). They are normalised in the interval of completeness. Right: cumulative distribution functions (CDF) of the PDSMFs from left panel and that of Chabrier et al. (2005) and Thies & Kroupa (2007) system initial mass function (normalised also in the interval of completeness). The Pleiades CDF shown is just from K_s band. The grey area depicts the area in which the null hypothesis of same PDSMF as that of the Pleiades can not be rejected (at α = 0.01).