2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39389Parton distribution functions are determined by the comparison of finite-order calculations with data. We briefly discuss the interplay of higher order corrections and PDF determinations, and the use of soft-gluon resummation in global fits.Contribution to the proceedings of the workshop ``Physics at Run II'', Fermilab, 1999; 6 Pages, LaTeX, two figures as eps filesHigh Energy Physics - Phenomenologytext