Mercantilism is a 16th century economic philosophy that believes a country's wealth comes from gold and silver holdings. It promotes exports and discourages imports to increase these holdings. Neomercantilists modernly support mercantilist policies that benefit their industries. The theory of relative factor endowments refers to the Heckscher-Ohlin theory that a country will have comparative advantage in goods using its abundant resources. It was tested after WWII, suggesting the US should export capital-intensive goods and import labor-intensive goods.