Most massive young cluster mass to galaxy-wide SFR (M_ecl,max–SFR) relation. The optimally sampled results for different β are shown as a red solid curve for β following Eq. (10), blue dotted curve for β = 2, and green dashed curve for β = 2.4. Observational data (gray dots) adopted from Weidner et al. (2004) have a typical uncertainty of 0.3 dex. The β = 2 and 2.4 curves are almost identical with Fig. 6 in Weidner et al. (2004; middle dotted and middle dashed curves, respectively), in which the δt = 10 Myr assumption is also adopted. See also Randriamanakoto et al. (2013).