Posterior density of the mean biasing function as function of halo mass m. The low-z samples are in the left panel, the high-z samples in the right panel. The dotted lines indicate b(m) = 1 for each sample. The shaded regions are the 68% CIs around the median (solid lines). The green lines show for comparison the b(m) in the SAMs (solid line: H15; dotted lines: L12) directly from the ⟨N|m⟩ in the simulation snapshots.