Bound fraction as a function of global or effective SFE. We compare our results (red lines) with previous works. The isolated models are depicted by the red diamonds, and non-isolated models by red crosses. In the top panel we use our global SFE (SFE_gl) and in the bottom panel, the effective SFE, eSFE = 1 /Q_⋆ (which is almost the same as the LSF, the local stellar fraction of our models).