海外直接投资是国际贸易理论与实践发展的更高阶段吴勤学进入２０世纪以后，随着国际分工体系的确立和国际贸易规模的扩大，生产要素流动的规模迅速扩大，并且成为国际交换的一种主要形式。国际资本流动的出现本身就意味着对古典国际贸易理论的一种挑战。按照李嘉图的理论... Overseas direct investment is a higher stage of the development of international trade theory and practice Wu Qinxue After the 20th century, with the establishment of the international division of labor system and the expansion of international trade, the scale of the flow of factors of production expanded rapidly and became a type of international exchange the main form. The emergence of international capital flows by itself means a challenge to classical theory of international trade. According to Ricardo’s theory ...