Luminosity dependence of the radial extent of the torus/disc (Y = R_o/R_d; left panels) and of the torus (disc) radius (right panels). From top to bottom panels the result for the various models with free Y parameter used in this work (see text for details). The first three bins correspond to the Sy galaxies of BCS₄₀ sample. We note that we also include two additional bins of a sample of QSOs with higher bolometric luminosities from Martínez-Paredes et al. (2021).