辟建中俄日韩四国煤粮共同市场与东北亚区域合作牛德林近些年来，世界经济发展的一大特点是日益走向区域化、集团化。促进区域经济集团化形成的因素是日趋激烈的国际竞争、贸易中心的转换和科技的飞速发展。一东北亚各国正在进行的区域化合作也有其必然性。它们在自然资源... The establishment of China, Russia, Japan and South Korea, the four countries, the common market of coal and grain and Northeast Asia regional cooperation in recent years, the world economic development is characterized by an increasingly moving toward regionalization, collectivization. The factors that promote the formation of regional economic collectivization are the increasingly fierce international competition, the conversion of trade centers and the rapid development of science and technology. The ongoing regional cooperation in Northeast Asia also has its inevitability. They are in natural resources ...