2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202731A genuinely non-perturbative evaluation of higher-twist contributions to the structure functions of the nucleon, with all mixing effects and renormalon ambiguities taken care of, is presented. Higher-twist corrections turn out to be significant at moderate values of $q^2$.Talk given by G. Schierholz at DIS99, April 19 - 23, 1999, Zeuthen, GermanyHigh Energy Physics - PhenomenologyHigh Energy Physics - Latticetext