Mass segregation ratios Λ_MSR (Allison et al. 2009, top row) and Γ_MSR (Olczak et al. 2011, bottom row) as a function of the number of most massive cores used in computing them, n_MST. The values of Λ_MSR and Γ_MSR are calculated for the entire population of cores in the star forming regions (left column) and for the populations of bound cores (prestellar cores and cores with a protostar). A version of this figure that includes estimates of the uncertainties on Λ_MSR and Γ_MSR for each individual region is shown in Fig. B.1.