روش شناسي اندازه گيري تجارت درون صنعت:يك مطالعه موردي براي صنايع كارخانه اي ايران

Intra Industry Trade Measuring Methodology: A Case Study of Iranʹs Manufacturing Industry

The main propose of this paper is to present methods and recent development in the literature of intra industry trade (ITT) measuring. The case study also is carried out for Iranian manufacturing industries during time period 1997-2003. For this, Iranʹs foreign trade data was collected, processed, and then used to estimate IIT indices with respect to recent literature developments in IIT measuring. Based on theoretical literature, Weighted Grubel and Loyd index and Fontagnʹe & Freudenberg Trade types index are flie most important static DT indices. Furthermore, Briilhart index and Azhar & Elliott index are die most important dynamic IIT indices. Empirical results indicate bw but increasing IIT in manufacturing industries of Iran. Furthermore, an important part of this IIT is devoted to Vertical Intra Industry (VDT). Marginal IIT of Iranʹs manufacturing industries also is bw but overwhelming. In other words, banʹs foreign trade change is mainly due to inter­industry trade. Thus, it seems that currently Iranʹs foreign trade is mainly based on comparative advantage. Generally speaking, this study is important due to increasing ITT studies and HT importance for developing nan oil exports for ban.