Comparison between galaxy regulation by postvirialization cooling and quasar feedback. In each panel the solid line shows the last redshift of formation as defined by ﹩z_{\mathrm{ex}\,}﹩ in our fiducial model, while the short‐dashed and long‐dashed lines impose postvirialization criteria according to eq. (41), with ﹩f=1﹩ and 1/2, respectively. Finally, the dotted lines correspond (top to bottom) to z‐values such that ﹩f_{S}( z,\ M) =0.25﹩, 0.5, 0.75, and 0.9, as in Fig. 5.