Hecksher Ohlin Theorem
In trade, a country exports the good in which they have comparative advantage
Stolper Samuelson Theorem
With trade, the income of the abundant factor increase while that of the scarce factor decreases
Rybschinzsky
When the supply of one factor increases in trade, the production that uses that factor intensively increases, while the other decreases
Factor price theorem
When prices equalize with trade, factor prices equalize as well