Left: monochromatic luminosity L₃₀₀₀ derived here from the fit of the AGN composite SED to the extinction-corrected photometric data compared with the values from the Shen catalogue after correcting for the same amount of extinction. Symbols as in Fig. 2. Middle: infrared luminosity L_IR versus the monochromatic 3000 Å luminosity L₃₀₀₀ from the Shen catalogue without extinction corrections. The black plus signs are for the quasars from Farrah et al. (2012). Right: infrared luminosity L_IR versus the extinction-corrected luminosity L₃₀₀₀ from the present study.