1. The proposition of the Heckscher-Ohlin Model that a rise in the relative price of a good raises the real wage of the factor used intensively in that industry and lowers the real wage of the other factor. 2. The further proposition (requiring addition assumptions) that protection raises the real wage of a country's scarce factor and lowers the real wage of its abundant factor. Due to Stolper and Samuelson (1941).