Relation between dust mass (M_dust) and stellar mass for all debris disks in our sample (violet solid line), a subsample of disks around stars aged between 10 and 50 Myr (orange dash-dotted line), and a subsample of disks older than 50 Myr (red dashed line). The violet-shaded regions indicate the 68% and 95% confidence bands for the fit to the entire sample. For comparison, two fits of the same relation derived for PPD in the 2–3 Myr old Chamaeleon I star-forming region by Pascucci et al. (2016) are shown as black solid lines. The differing slopes of the PPD fits reflect model-dependent uncertainties in the inferred scaling relations.