Regional economic integration involves countries reducing trade barriers between each other to promote the free flow of goods, services, and factors of production. There are various levels of integration ranging from free trade areas to political unions. Countries pursue integration to gain economic benefits from free trade and investment and to increase political cooperation. However, integration faces challenges from loss of national sovereignty and potential trade diversion. The European Union is the most integrated bloc in Europe while efforts are ongoing in other regions like North and South America and Africa. Economic integration opens new markets for managers but also increases competition within blocs.