自20世纪90年代以来,产业内贸易(IIT)指标从标准G-L指数不断发展为新的分类指标、动态指标和一些扩展指标。这些指标使我们对IIT的经验研究不再局限于简单的系数估计,而是可以依据研究目标来检验IIT理论的适用性,预测具体的IIT模式,以及估计贸易扩张的动态调整效果等。本文尝试将这些IIT指标及其适用范围进行综述,以期对人们进行有关研究有所裨益。 Since the 1990s, the IIT indicators have evolved from the standard G-L index to new classification indicators, dynamic indicators and some expansion indicators. These indicators make our empirical study of IIT no longer limited to a simple coefficient estimation, but can test the applicability of IIT theory according to the research objectives, predict the specific IIT model, and estimate the dynamic adjustment effect of trade expansion. This article attempts to summarize these IIT indicators and their scope of application, in the hope of helping people carry out the relevant research.