Evolution of the B‐band quasar luminosity function. In all panels the long‐dashed lines show the WL03 model with ﹩F=1.0﹩, the solid lines show our fiducial ﹩F=1.0﹩, ﹩\epsilon _{k}=0.05﹩ model, and the upper and lower short‐dashed lines show models in which ﹩F=1.0﹩ and ﹩\epsilon _{k}﹩ is 0.025 and 0.10, respectively. Points are as in Fig. 1.