Columbia subject headings:
Economic development--Mathematical models.
Johansen, Leif.
Norway--Economic policy--Mathematical models.
Production functions (Economic theory)
Harvard subject headings:
Economic development--Mathematical models
Johansen, Leif.
Norway--Economic policy--Mathematical models.
Production functions (Economic theory)
Princeton subject headings:
Economic development--Mathematical models.
Johansen, Leif.
Norway--Economic policy--Mathematical models.
Production functions (Economic theory)