Central and bottom panels: non-parametric velocity W80 and V_max estimators as a function of [O III] (left) and intrinsic 2–10 keV X-ray (central) luminosity, as well as a function of the black hole mass for the BL AGN subsample. Red/yellow dots represent average velocity in bin of luminosity; bars indicate uncertainties of the averages. Green dots indicate faint X-ray sources for which the intrinsic L_X has been inferred using HR ratio corrections (see text). Top panels: fraction of AGNs with V_max> 650 km s^-1 (blue dashed line; first panel from the top) and distributions of V_max< 650 km s^-1 (black line) and V_max> 650 km s^-1 (blue dashed line; second panel from the top) as a function of [O III] (left), X-ray (central) luminosity, and M_BH (right).