2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/1983In previous studies we have shown that the optical variability of quasars increases, on average, with redshift. We explained this dependance in terms of a hardening of the spectrum during bright phases, coupled with the increase of the rest-frame frequency for increasing redshift. We re-analize now these correlations on the basis of new light curves of PG quasars, recently published by the Wise Observatory group.3 pages, 3 figures, Guillermo Haro Advanced Lectures on the Starburst-AGN Connection, Tonantzintla, Mexico, June 26-30 2000Astrophysicstext