Regional economic integration treaties are usually signed between nations with relatively small economies and a lack of foreign trade and investment. While these treaties are intended to promote increased trade within the region, they can have the unintended effect of reducing trade with nations outside the agreement, since those nations must pay tariffs and deal with other trade barriers while the member states don't. If the trade lost from non-member countries is greater than the trade gained from member countries through the agreement, the result is known as "trade diversion.