Left: redshift evolution of bias for different XMM-COSMOS AGN subsamples. Crosses mark AGN subsamples where photometric redshifts are included in addition to spectroscopic redshifts. The gray dashed lines correspond to constant halo mass bias evolution b(z, M_halo = const) for log M_halo = 11.5, 12.0, 12.5, 13.0, 13.5 where M_halo is given in units of h⁻¹ M_⊙. Right: corresponding typical AGN hosting halo mass evolution with redshift. For visual guidance, the dashed lines show the estimated mass of the halo for the full spectroscopic AGN sample.