Comparison of the redshift dependence of ${\overline{q}}_{\mathrm{IR}}$ derived from the Bonato et al. (2017) model (solid black line) with determinations from the Delhaize/MIGHTEE sample and with the results by Algera et al. (2020). The error bars for the Delhaize/MIGHTEE sample, which are in many cases lower than the symbol size, are the Poisson uncertainties provided by the ASURV package. The true errors, including contributions from uncertainties on photometric redshifts and from the incomplete data used to estimate IR and radio luminosities, are far larger but difficult to quantify. The model values of ${\overline{q}}_{\mathrm{IR}}$ were computed adopting mean values of q_IR of 2.64, 2.35, and 2.2 for normal late-type, starburst, and protospheroidal galaxies, respectively, and weighting with the redshift-dependent abundances shown in Fig. 1.