Numerous models are proposed to model international trade and promote it. Vanek, instead of designing a trade pattern based on the production, introduced a pattern based on the factor content of trade. In the present study, apart from the Heckscher-Ohlin-Vanek (HOV) theorem, we attempt to determine the factor content of Iran's trade without factor price equalization by using internal input-output tables. Net trading is positive only for 7 sectors of Iran's economy, including oil and gas. It is negative for 91 percent of sectors that accounts for 78 percent of the economy. Moreover, Iran's factor content of trade is positive for 50 percent of industries, negative for 48%, and it is zero for two ones. In general, the factor content of trade for raw and mineral materials, services, electricity, gas and water infrastructure sectors are positive. In contrast, the factor content of trade is negative for activities like manufacturing of machinery and equipment and in general for sections that require intermediate investment and high-tech goods. Sign and rank tests are employed to assess the validity of HOV theorem. The sign test was found to be satisfied for 67% of cases. Rank test showed satisfaction in about 47% of the cases. JEL Classification: Y10: P45: O53: F14
