SFR vs. stellar Mass relation for star-forming galaxies in different redshift bins. The V_max weighted means are shown for the 24  μm sample (SFR based on Eq. (1), open black stars); the COSMOS K-selected sample using the SFR derived from the NRK approaches (original method: filled red circles and with sSFR-correction: filled green squares); the local GALEX-SDSS-SWIRE sample (blue open squares). We compare with the local estimate from Salim et al. (2007) (red lines) and the radio stacking analysis by Karim et al. (2011) (heavy dark-blue lines). The region where the NRK method becomes less reliable is shown as light shaded area.