  We present an improved model on neutrino- and electron-nucleon scattering
cross sections using effective leading order PDFs with a new scaling variable
xi_w. Non-perturbative QCD effects at low Q^2 are separately treated for u and
d valence quarks, and sea quarks. The improved model uses all inelastic charged
lepton F_2 data (SLAC/BCDMS/NMC/HERA), and photoproduction data on proton and
deuterium. In this way, we obtain an improved model which describes all
inelastic scattering charged lepton data, JLAB resonance data, and neutrino
data. This improved model is expected to be better for neutrino oscillation
experiments at few GeV region.
