Columbia subject headings:
Economic development--Mathematical models.
Economic forecasting--Mathematical models.
Economic history--1945---Mathematical models.
International economic relations--Mathematical models.
Harvard subject headings:
Economic development--Mathematical models
Economic forecasting--Mathematical models.
Economic history--1945---Mathematical models.
Economic history--1971-1990--Mathematical models.
International economic relations--Mathematical models
Princeton subject headings:
Economic development--Mathematical models.
Economic forecasting--Mathematical models.
Economic history--1971-1990--Mathematical models.
International economic relations--Mathematical models.