Comparison of the model results to the observed “stacked” evolution of disk galaxies of stellar mass 5 × 10¹⁰M_⊙ (dotted curves) from van Dokkum et al. (2013). Top: evolution of the total SFR (black solid curve), decomposed into bulge and disk contributions. Bottom: evolution of the stellar mass of the bulge (r< 2 kpc) and of the disk (r> 2 kpc) of the model (solid red and blue curves, respectively).