 Due to the constant traveling caused by the exile of his father during the military dictatorship of Augusto Pinochet, Lagos Weber was forced to complete his studies in eight different schools, finishing his secondary education at Colegio San Agustin.He completed his undergraduate studies at the Universidad de Chile School of Law, receiving his Bachelor of Law and Social Sciences degree in 1985.He continued his education at the University of Sussex in England, where he obtained a Masters in Economic Development at the Institute of Development Studies.