Observed volume-averaged UV-to-Hα ratio plotted as a function of the observed UV luminosity using the empirical relations derived from abundance matching the ﹩z\sim 2﹩ UV LF and Sobral et al. (2013) Hα LF, using two UV dust prescriptions: Meurer et al. (1999, red curve) and Reddy et al. (2015, green curve). The horizontal band again shows the expected ﹩{\mathrm{log}}_{10}[\nu {L}_{\nu }(1500)/{L}_{{\rm{H}}\alpha }]﹩ value for constant star formation, including a variety of IMFs and metallicities (see text for details). The abundance-matched DM halo mass is plotted on the top axis. Corresponding stellar masses are computed using the z = 2.2 stellar mass–halo mass relation from Behroozi et al. (2013) and plotted on a parallel axis. The shaded regions show the ﹩1\sigma ﹩ confidence regions for the measured empirical relation. The darker shaded bands show the range where both UV and Hα LFs have observations, whereas the lighter shaded bands show the range when UV LFs have observations, but the Hα LF has been extrapolated.