Implications of the Tevatron Jet Results on PDF

We report a new measurement of the pseudorapidity (eta) and transverse- energy (Et) dependence of the inclusive jet production cross section in pbar p collisions at sqrt(s)=1.8 TeV using 95 pb**-1 of data collected with the D0 detector at the Fermilab Tevatron. The differential cross section d^2sigma/(dEt deta) is presented up to |eta|=3, significantly extending previous measurements. The results are in good overall agreement with next-to-leading order predictions from QCD, indicate a preference for certain parton distribution functions, and provide the world's best constraint on the gluon distribution at high parton momentum fraction x.Comment: Invited talk at Deep Inelastic Scattering 2001, Bologna, Italy, April 27 - May 1, 200