Mean of the ratio of the bias measured in simulations with respect to the PBS prescription. Left: ratio of the bias as a function of v/(1 + z) for different z, labeled by Ω_m(z), for all the CO runs. Center, mean ratio as a function of v for the three EdS cosmologies of pure power-law shapes of the linear power spectrum at z = 0. We report the value of the three spectral indexes in the inset. Right: mean ratio as a function of the background evolution Ω_m(z) for the C0, C9, and C10 cosmologies with varying S₈.