This research basically aims to fully understand the classification of Non-Tariff Measures(NTMs) and the method of estimating Ad-Valorem Equivalents(AVEs) of NTMs. Especially, of those ASEAN countries, it has studied Indonesia where has relatively large market and lately introduced a range of  Non-Tariff Barriers(NTBs). Also it has estimated AVEs of NTMs on specific steel products.
Since 2008, new classification system has been suggested with UNCTAD as a centre and it can be categorized into import measures and export measures. And the import measure is divided into technical measures and non-technical measures. Particularly the distinction of technical measures can be understood as a cause of the dramatic growth in Technical Barriers to Trade(TBT) and Sanitary and Phytosanitary measures(SPS).
After global financial crisis, Indonesia has introduced the restriction of import policy on main import goods. This was for improvement of trade balance caused by export reduction, short-term native industry protection and long-term local industry promotion. Moreover, Indonesia supports from natural resources to manufacturing business in agriculture, shoes and steel industry to be expanded to export industry, as well as, they contribute various benefits to local industry in order to develop trade-related local service industry like financial and distribution.
For the AVEs of NTMs, firstly estimation method based on trade volume through gravity model and comparative advantage theory, is recently increasing rather than direct price comparison. This is because information securing on non-tariff item by item has become easier than before. Especially, statistics database such as TARINS of World Bank and UNCTAD has released the details of NTMs including SPS and TBT for each product. CoRe NTMS Database which is led by the United States international Trade Commission(USITC) has recently been introduced and the details of NTMs for major trade countries have also been released.
This research has estimated AVEs on NTMs of steel products in a whole world. Although it is under the similar condition of NTMs in accordance with the characteristics of those countries’ products, there is a big difference between the influences. Especially the product  having more elastic demand has shown much higher effect of trade protection.