2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53466We report on the recent progress in computing the effective supergravity action from superstring scattering amplitudes beyond the tree approximation. We discuss the moduli-dependent string loop corrections to gauge, gravitational and Yukawa couplings.11 pages, CPTH-C218.0193 (Based on talks presented at the Rome Workshop STRINGS 92, at the 7th Meeting of the American Physical Society, and at the 26th Erice Workshop: ``From Superstrings to Supergravity")High Energy Physics - TheoryHigh Energy Physics - Phenomenologytext