University of Tehran Journal of Economic Research (Tahghighat- E- Eghtesadi) 0039-8969 39 1 2004 03 20 - - 10078 FA Journal Article Efficiency Export Globalization IIT (Integration of International Trade) IIT (ادغام تجارت بین المللی) LIT (Level of International Trade) LIT (سطح تجارت بین المللی) https://jte.ut.ac.ir/article_10078_2754518221cfbc8d25c13a06a4cb8421.pdf