  Superscaling analysis of electroweak nuclear response functions is done for
momentum transfer values from 300 to 700 MeV/c. Some effects, absent in the
Relativistic Fermi Gas model, where the superscaling holds by construction, are
considered. From the responses calculated for the 12C, 16O and 40Ca nuclei, we
have extracted a theoretical universal superscaling function similar to that
obtained from the experimental responses. Theoretical and empirical universal
scaling functions have been used to calculate electron and neutrino cross
sections. These cross sections have been compared with those obtained with a
complete calculation and, for the electron scattering case, with the
experimental data.
