Quantile-quantile plots of the marginal posterior distributions of the CBC merger rate population parameters inferred from the 42 BBHs in GWTC-3. The plots columns correspond to the model used to calculate the GW luminosity distance as a function of redshift, see Appendices A.1–A.2. The legend and different lines report the population parameters. All the benchmark runs use the POWER LAW + PEAK model for the source mass (cf. Appendix B.2) and the MADAU-DICKINSON merger rate model (cf. Appendix B.1).