Four Hypotheses

Abstract

The mainstream trade theory revolves around the four theorems described earlier: (1) the Heckscher—Ohlin theorem determining the pattern of trade, (2) the factor—price equalization theorem, (3) the Stolper—Samuelson theorem on changes in relative factor prices depending on different factor intensities of countries starting to trade with each other and (4) the Rybczynski theorem determining output changes when the supply of a particular factor increases depending on factor intensity of output.