When each of two countries has a comparative advantage they are better off producing what they are best at and purchasing the rest. The comparative advantage of each country determines what happens when they trade.The outcome will depend on the price of each good relative to the other when trade occurs. ❑ When each of two countries has a comparative advantage they are better off producing what they are best at and purchasing the rest. ❑ The comparative advantage of each country determines what happens when they trade. The outcome will depend on the price of each good relative to the other when trade occurs