The WTO is also a centre for economic research and analysis: the organization establishes regular assessments of the global trade image in its annual publications and research reports on specific topics.  Finally, the WTO works closely with the other two components of the Bretton Woods system, the IMF and the World Bank.  In 2007, WTO member states accounted for 96.4% of world trade and 96.7% of world GDP.  Iran, followed by Algeria, have the highest GDP and trade as the largest outside the WTO, with 2005 data used.   With the exception of the Holy See, observers must begin accession negotiations within five years of becoming observers. A number of international intergovernmental organizations have also been granted observer status in WTO forums.  12 UN member states do not have formal membership in the WTO. [Citation required] Although tariffs and other trade barriers have been significantly reduced through the GATT and the WTO, the promise that free trade would accelerate economic growth, reduce poverty and increase people`s incomes has been challenged by many critics.  Some prominent skeptics cite the example of El Salvador. In the early 1990s, they eliminated all quantitative import barriers and also reduced tariffs.
However, the country`s economic growth has remained weak. On the other hand, Vietnam, which did not begin to reform its economy until the late 1980s, was very successful in deciding to follow the Chinese economic model and liberalize itself slowly, along with the implementation of safeguards for domestic trade. Vietnam has been largely successful in accelerating economic growth and reducing poverty without immediately removing significant trade barriers.   The TRIPS agreement was revised in 2003 for developing countries under the Doha Development Agenda, when all members agreed, in some cases, to compulsory licensing. However, the United States and Europe remain dissatisfied with the current strict patent conditions under TRIPS. In the area of trade reform, a tariff reduction programme has continued and is expected to continue. As a result, average rates have fallen. The number of products subject to import restrictions has been gradually reduced, although the focus has been on industry and capital and not on consumer goods until recently.
The foreign investment regime has also been simplified due to the opening of a number of sectors to foreign direct investment. As far as I know, in a document released this morning, the provisions of the S-D Community have been largely divided into (a) provisions which have the effect of increasing trade opportunities (b) provisions requiring WTO members to protect the interests of developing countries; (c) provisions allowing developing countries to assume less ae-ancement obligations; (d) transitional period provisions; and (e) the technical assistance provisions.