Instantaneous star formation efficiency (defined here as SFR/BAR, where BAR is the baryonic accretion rate) as a function of halo mass at various redshift predicted by our model. The predictions from model C are plotted with a solid line. At z = 5 model A predicts a different efficiency distribution and is represented by a dashed line. Upper panels shows this efficiency only for main-sequence galaxies and lower panels for mean efficiency. We use slice of instantaneous halo mass in the left panels and mass at z = 0 in the right panels.