if companies can charge less for products, even undercutting competitors by selling them at below cost to drive them out of business, inside a country why shouldn't they be able to use this strategy globally? Give an example of a quota that was placed on

if companies can charge less for products, even undercutting competitors by selling them at below cost to drive them out of business, inside a country why shouldn't they be able to use this strategy globally?

Give an example of a quota that was placed on a product being imported to the United States that was successful? Tell me what you think the benefit of that action was/is.