During those three years, he obtained a master's degree in economics from Columbia University.

He worked through his medical studies well up to third year and furthermore obtained a distinction in political economics in 1963.

He obtained a bachelor's degree in economics at Harvard.

Nathanael plans obtain a dual degree in economics and finance.

He then obtained a master's degree in economics (1972).

He obtained his degree in economics in 1985 from University of Indonesia.

To obtain a diploma in History or Economics it takes four semesters.

He furthered his studies at Harvard University and obtained a master's degree in economics.

He then obtained a master's degree in economics from the same university, before continuing his education in the United States.

He obtained a master's degree in economics from the University of Cambridge in 1980.