In addition to his role as an academic and academic administrator , PERSON@1 served as an advisor to LOCATION@1 presidents PERSON@2 , PERSON@3 , PERSON@4 , and PERSON@5 .

From NUMBER@1 to NUMBER@2 , he was the economic adviser to the LOCATION@1 presidents PERSON@2 , PERSON@3 , PERSON@4 and PERSON@5 .
