现代国际贸易理论中的国内和国际规模收益

在二战后的国际贸易中,工业化国家之间的制造业产品的交易量巨大,这种产业内贸易现象的出现,在一定程度上对传统的赫克歇尔-俄林-萨缪尔逊贸易模型产生了冲击和质疑。经济学家从多个角度寻求对这种现象的理论解释,并开始注意产品差别化及其对规模经济的影响,但是,这些研究对贸易理论的影响很小,并且解释现实的能力也很弱。因此,把差别化的生产资料作为研究的重点,在国际收益的框架下,建立模型以推出国际规模收益,并且运用这一模型得出了国际规模收益、传统的国内规模收益和要素禀赋论之间的关系。

National and International Returns to Scale in the Modern Theory of International Trade

Since the WWII the largest and fastest growing component of world trade has been the exchange of manufactures between industrialized economies. The emerging of the intraindustry trade has somewhat challenged and cast doubts on the traditional Heckscher-Ohlin-Samuelson (H-O-S) trade model. Economists have some insight into this phenomenon, and attention has accordingly shifted to influence of the product differentiation on the economies of scale. But their research has no little impact on the dominating trade theory. What's more, they cannot give sufficient explanation to the modern trade practices. This paper focuses on the differentiated producer goods and constructs a model yielding international returns to scale. It also employs this model to explore the relations between international returns, the traditional national returns to scale and the factor endowments theory of international trade.