Without a doubt, there are several barriers in front of international trade which some of them created by governments in order to protect their domestic production and some of others have been created through various situations either inside the country or internationally. Basically, there are two different major barriers:
1. Tariffs (tax on imported goods) and quota (limitation on amount of imported goods). As it said earlier, tariffs and quotas are usual ways to support national products and producer. Therefore, they can be encouraged to produce high quality goods which can be competed in international marketplace.
2. Nontariff barriers are countless. Various nations have different perspectives such as: product quality, religion attentions, harbor and airport permits or environmental factors which cause to lower amount of trade.
However, other factors which could lead to trade limitation cannot be ignored. The most important example that is really well known is about the war between Iran and Iraq in 1980. In the following I will discuss impacts of this war on Iranian trade.
Over the past 3 decades conflicts and international sanctions in the Middle East have had a significant impact on regional trade flows. Currently there exists a strong potential and development in sectors which the Gulf countries may maintain regional comparative advantage rather than international one. Development of trade in such sectors and commodities could particularly enhance regional trade flows and condense the strength of regional economies through expansion and diversification.
Overall Iranian trade contracted in 1986 because of increased import restriction coupled with consistent decreasing export earnings. Iranian world imports began to decline of almost 55 per cent. The import of capital and consumer goods had started to decline after the 1979 Revolution; however, between 1979 and 1982, after the outbreak of the war, capital goods imports fell from 30 percent of total imports to 15 percent.
Exports suffered worse as they fell from their peak of USD 19,185 million in 1983 to their lowest point of USD 8,044 million in 1986, a decline of almost 60 per cent. The increase in prices and fixed salaries cause to a high rate of inflation, which ranged between 10 and 50 percent and Iran faced a large trade deficit during those years.
Part of this deficit was formed by Iran's sky rocketing food imports. Food imports
increased to more than USD 2 billion by 1983 and by 1986 food imports consumed as much as 20 percent of total foreign exchange. The nation spent about USD 3 billion per year on food items such as wheat, rice, meat, vegetable oil, eggs, chicken, tea, and sugar. Soon, through a conscious effort by the Iranian government to contain the deficit crisis through restricting imports of luxury goods and import substitution imports declined to USD 2.6 billion at the end of 1986. Iran resorted to barter agreements with some countries in 1986 and 1987, trading oil for goods such as tea from Sri Lanka, rice from Thailand, wheat from Argentina.
In conclusion, it is clear that frictions in the Middle East have had a substantial impact on regional trade flows. In addition, the lack of predictability in regional trade may have created greater reliance and eventually crowded out the development of regional trade integration.