2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40715We review theoretical methods employed to study non-perturbative contributions to e^+e^- event-shapes and discuss their phenomenological relevance.4 pages, 2 figures, talk given by A.B. at the LEPTRE Conference, Rome 18-20 April 2001, camera.cls includedHigh Energy Physics - Phenomenologytext