Left: derived linear bias parameter b as a function of redshift for radio and optical AGN samples represented by the corresponding legend. Red or gray triangles represent the RLQs or RQQs sub-samples of this work, respectively. The dashed lines denote the expected redshift evolution of DMH masses based on the models from Sheth et al. (2001) with . Right: typical DMH masses M_DMH against redshift for RLQs and RQQs from our sample (red and gray triangles, respectively), RLQs and RQQs from SDSS DR5 (purple and gray downward triangles, Shen et al. 2009, respectively), optical quasars (gray circle, Croom et al. 2005; Ross et al. 2009; Eftekharzadeh et al. 2015), radio galaxies (RGs, dark green squares, Peacock & Nicholson 1991; Magliocchetti et al. 2004; Wake et al. 2008; Fine et al. 2011; Lindsay et al. 2014b,a; Allison et al. 2015; Nusser & Tiwari 2015), and flat-spectrum radio quasars (FSRQs) (orange star, Allevato et al. 2014a). For comparison, we show with dashed lines the mass values corresponding to When bias and mass estimations are not provided by the authors we use the reported power-law best-fitting values to estimate b and M_DMH (Peebles 1980; Krumpe et al. 2010).