The \nch dependence of the mean (left panel) and standard deviation (right panel) of the \pt distributions for (particle-composition corrected) Monte Carlo events in \pp, \ppb and \pbpb collisions at $\sqrsn = 5.02\tev$. Results propagated through a full GEANT model of ALICE and corrected with the sequential 2D unfolding (closed circles) procedure described in the text are compared with the generator-level (open squares) distributions and their ratios are shown in the bottom panels.