Parton densities from deep inelastic scattering to hadronic processes at super collider energies

We give several sets of parton densities derived from recent measurements of structure functions in deep inelastic scattering. The difference among these densities reflects the uncertainties from deep inelastic data of different experiments, allowing an estimate of the error band for the predictions one may obtain for any given hadronic process at higher energy. The densities are available at any scaleQ ²≦5.10⁹ GeV² andx≧5.10^?5 and include next-to-leading corrections as well as threshold effects due to heavy flavours. A comparison with a large set of data in a wide range of scales (Drell-Yan,W andZ production, etc.) is also presented.