二战后，随着世界经济的迅速发展，地区性经济集团开始建立起来，使地区经济一体化得到了很大的发展。最初，经济发展程度差异不大的国家为了利用别国的资源资金和技术来发展自己的经济，互相联合起来，组建经济集团；到８０年代中期特别是９０年代初，经济发展程度差异较... After the Second World War, with the rapid development of the world economy, the regional economic groups began to establish and the regional economic integration has greatly developed. At first, countries that did not have much difference in economic development used their resources and technology to develop their own economy and jointly formed economic groups. By the mid-1980s, especially in the early 1990s, the differences in the degree of economic development were even worse. .