sSFR functions per redshift bin from 0.2 <z< 0.4 to 1.2 <z< 1.4 (from the top to the bottom rows) and per stellar mass bin from 9.5 < log (M⋆) < 10 to 11 < log (M⋆) < 11.5 (from the left to the right columns). The non-parametric data have been obtained using the 1/V_max estimator. The black filled and red open circles correspond to the COSMOS and GOODS fields, respectively. The arrows correspond to the lower limits obtained with the 1/V_max. The black solid lines and green dashed lines correspond to the best-fit functions assuming a double-exponential and a log-normal profile, respectively. Both include a starburst component (see details in Sect. 4.2). The blue dotted lines correspond to the double-exponential fit without considering the starburst component.