Posterior distributions of hyperparameters for the mass-interval population models of Section 2. Here, ﹩{N}_{{\rm{inj}}}^{{\rm{eff}}}/{N}_{{\rm{obs}}}﹩ gives the total number of injections divided by the number of detections. The quantity R_ref represents the differential merger-rate density in units of ﹩{{\rm{Gpc}}}^{-3}\,{{\rm{yr}}}^{-1}\,{M}_{\odot }^{-1}﹩, evaluated at m₁ = 20 M_⊙ and redshift z = 0.2. In this model, we set ﹩({\tilde{m}}_{{\rm{low}}},\,{\tilde{m}}_{{\rm{high}}})=(18,30)\,{M}_{\odot }﹩.