Effective yield as a function of μ_g. Galaxies are coded by gas fraction, F_g, as shown in the vertical color bar. MAGMA medians are shown as a heavy gray line, with ±1σ excursions as the surrounding gray regions. The two dashed curves correspond to the predictions from the Δη and ζ_w parameterizations (see also Fig. 3), with the symmetric Δη priors given as a short-dashed (purple) curve, and the Δη ≥ 0 priors as a long-dashed (orange) one. The horizontal dashed line corresponds to our adopted true yield y = 0.037 (see text).