[2][3][4][5][6][7] His greatest contributions were in the field of Social and Economic history of Chile during the eighteenth and nineteenth centuries.

Likewise, he had collaborated in the social history of the Andean region shared by Bolivia, Peru and his country.

[8] In 1976 he graduated as Historian at the History Institute of the Pontificia Universidad Católica de Valparaíso (PUCV).

In 1982 he concluded his master's degree in history in the Madison University.

[9] On 22 November 2018, he was invested as an Emeritus Professor of his alma mater.