Corner plots of the parameter space (α, log M_c) (the slope and the cut-off mass, respectively), obtained fitting a Schechter mass function to a sample of mock clumps extracted either from a power-law (top row) or a Schechter (bottom row) function. The plots to the left refer to cases in which the fitted sample was large (∼1000 objects), while for those to the right the sample was small (∼100 objects). The red line marks the input slope of both the power-law and the Schechter mock distributions (α = 2). The green line marks the cut-off mass (log M_c/M_⊙), which is present only in the case of the Schechter. Values on top of each histogram are the median of each distribution for the corresponding parameter, with uncertainties given by the 84th percentile minus the median and the median minus the 16th percentile (upper and lower uncertainty, respectively). The same values are also reported as black dashed vertical lines in the histograms.