Heredia served as a ( PRD ) Member of Mexico 's 57th Congress from 1997 to 2000 .
Carlos Heredia is a Mexican economist born in Tampico , Tamaulipas in 1956 .
economist served as a ( PRD ) Member of Mexican 's 57th Congress from 1997 to 2000 .
Carlos Heredia is a Mexican economist born in Tampico , Tamaulipas in 1956 .