Various extensions to this idea were added by Jaroslav Vanek in the 1960s, and earlier by Paul Samuelson in the 1930s.  
Various extensions to this idea were added by Jaroslav Vanek in the 1960s, and earlier by Paul Samuelson in the 1930s.  It is based on four main theorems, two of which, the Rybczynski and Stolper-Samuelson theorems, describe various relationships between this model's variables, while the factor-price equalization and its namesake theorem discuss its key results.  Also known as the factor proportions model, it proved invaluable in developing the input/output model of Leontief.  FTP, identify this economic model named after two Swedish economists that discusses trade between two countries.
Various extensions to this idea were added by Jaroslav Vanek in the 1960s, and earlier by Paul Samuelson in the 1930s.  
Heckscher-Ohlin model