Stellar mass versus the star formation rate. See Fig. 10 for a description of the different studies. The black dots and dark grey region correspond to the SFR for galaxies in CANDELS at z ~ 4 as determined by Salmon et al. (2015), while the black dashed line presents an extrapolation to lower masses based on these data. We show the SFR for a sample of z = 2.0−2.5 galaxies from Whitaker et al. (2014) and three possible extrapolations to lower masses with the black line and three grey lines respectively.