Evolution of the median sSFR as a function of redshift. Each panel corresponds to a stellar mass bin. The blue dashed lines correspond to the median sSFR expected from the semi-analytical model. The orange area is derived by measuring the rms of the sSFR in the semi-analytical model. The solid circles correspond to the median sSFR measured in this work. The vertical error bars indicate the σ derived from the fit with a log-normal function (i.e., the intrinsic scatter of the M⋆−sSFR relation). The solid (dotted) lines correspond to the fit over the data using Eq. (5) assuming that b does (does not) depend on the mass. The green shaded area corresponds to the analytical relation from Neistein & Dekel (2008) to describe the sMIR evolution, corrected for the mass loss as discussed in Appendix A.