Published in Manila Bulletin (1990)

Published in The Philippine Review of Business and Economics (1989)

Published in Philippine Review of Economics and Business (formerly The Philippine Review of Business and Economics) (1989)

Published in Philippine Collegian (1986)

Published in The Philippine Review of Business and Economics (1986)

Published in Philippine Review of Economics and Business (formerly The Philippine Review of Business and Economics) (1986)

Published 1984

Published in Philippine Labor Review (1977)

Published 1971

Published 1970