通过一个微观经济学模型,说明在存在较高交易费用的情况下,有效率的中介参与交易将优于买卖双方的直接交易。互联网的应用尽管会使得一些传统国际贸易中介受影响甚至被取代,但由于仍然存在各种交易费用,中介仍然有存在的必要性,新的网络贸易中介还将进一步兴起和发展。 Through a microeconomic model, it shows that in the presence of higher transaction costs, efficient intermediary transactions will be better than direct transactions between buyers and sellers. Although the application of the Internet will make some traditional international trade intermediaries affected or even replaced, the intermediaries still have the necessity of existence due to various transaction costs, and the new online trade intermediary will further rise and develop.