Comparison of the GSMF with and without an allowed nebular contribution. The stellar mass function of galaxies at 3.5 ≤ z ≤ 7.5 in the CANDELS GOODS-South and UDS fields with our standard BC03 fit (exponentially declining SFHs and no nebular contribution) is shown by the black triangles and the solid continuous curves. The blue asterisks show the GSMF derived using BC03 models and exponentially declining SFHs, but this time including the contribution of nebular lines and nebular continuum.