贸易引力模型的扩展及应用综述

Reviews on Expansion and Application of Trade Gravity Model

引力模型在双边贸易流量决定因素实证研究中的应用越来越广泛,其理论基础也越来越完善。早期对贸易引力模型的扩展主要体现在研究区域经济合作对双边贸易流量的影响上,近期人们开始通过添加制度质量指标来考察各国国内制度因素以及制度趋同对双边贸易的影响。通过应用引力模型的研究发现,各国制度的优劣对双边贸易有显著的影响,制度相似的国家间贸易量较大。

The application of gravity model is more widespread in empirical research on determinants of bilateral trade flow, and its theory is more perfect. In an early period, the expansion of trade gravity model mainly focuses on the influence of regional economic cooperation on bilateral trade flow; recently we begin exploring the factors of national systems of all countries and influence of system trend on bilateral trade through increasing system quality index. The research via gravity model shows that the system quality of each country will impact bilateral trade effectively, and the trade flow is large between the countries with similar systems.