First, it is one of the names sometimes used for free trade agreements to emphasize their preferential nature as opposed to trade liberalization in the WTO or unilateral tariff reductions. Since the beginning of the 20th century, several hundred bilateral APAs have been signed. The TREND project of the Canada Research Chair in International Political Economy lists approximately 700 trade agreements, the vast majority of which are bilateral.  With the recent proliferation of bilateral TFA and the emergence of mega-APTs (far-reaching regional trade agreements such as the Transatlantic Trade and Investment Partnership (TTIP) or the Trans-Pacific Partnership (TPP)), a global trading system managed exclusively within the framework of the WTO now seems unrealistic and interactions between trading systems must be taken into account. The increasing complexity of the international trading system resulting from the proliferation of PTAs should be taken into account when considering the choice of forums used by countries or regions to promote their trade relations and environmental agenda.  TPAs have grown rapidly; In the 1990s, there were just over 100 APTs. In 2014, there were more than 700.  Preferential trade agreements, or APTs, are formal trade agreements between countries that benefit from trade with each other. In many cases, these benefits are the product of proximity; Countries that are close to each other are better able to trade because of both lower transport costs and greater opportunities for transparency. When trade agreements are created in this regional way, they are sometimes referred to as regional trade agreements or RTAs. There is a lot of debate about whether APTs increase or redirect trade.
The basic principles underlying these two arguments are that, while APTs can promote trade that would not otherwise exist, they also have the potential to capture trade that would otherwise take place with members outside the PTA and away from the least expensive producer. Ideally, the creation of trade should take precedence over the diversion of trade.  Regional Trade Agreements (RTAs) – the WTO uses the term “regional trade agreements” as an umbrella term for all mutual agreements such as customs unions, free trade agreements and partial scope agreements. This can be explained by the fact that such agreements originally fell within the competence of the WTO Committee on Regional Trade Agreements. In reality, these trade agreements do not necessarily have to include members from the same region (e.g. B, the EU-Canada or Peru-South Korea free trade agreements). Preferential trade agreements (EPAs) are treaties that remove barriers to trade and set rules for international trade between two countries or between a small group of countries. APTs have a direct impact on a country`s economy by changing its trade and investment flows. Primarily through trade, APTs indirectly affect other aspects of a country`s economy, such as productivity, production, and employment. As of August 2016, the United States had established 14 TPAs with 20 of its trading partners. This report reviews the economic literature on trade and TPAs and summarizes the results of the literature on how trade and TPAs have affected the U.S. economy.
A preferential trade area (also known as a preferential trade agreement, PTA) is a trading bloc that grants preferential access to certain products of participating countries. This is done by lowering tariffs, but not by abolishing them completely. An APT can be established through a trade pact. This is the first step in economic integration. The boundary between a PTA and a free trade area (FTA) can be blurred, as almost all PTAs have the primary objective of becoming a free trade agreement in accordance with the General Agreement on Tariffs and Trade. To ensure that member countries comply with the provisions of an agreement, APTs establish dispute settlement mechanisms. These mechanisms can take two forms: one provides a legal platform for countries to assert rights against other member countries; The other allows investors from member countries to assert claims against the governments of other member countries. The United States enters into preferential trade agreements for economic and non-economic reasons. These agreements allow the United States and its partner countries to reap the economic benefits of increased trade and investment. In addition, agreements sometimes harmonize laws and regulations, which, among other things, leads to the cost of operating stores in other countries becoming more similar to those in the United States.
An important non-economic reason for the establishment of APTs is the achievement of foreign policy objectives. These objectives include support for U.S. economies. Allies and promotion of the adoption of preferential national policies, such as environmental protection or the strengthening of workers` rights. As mentioned earlier, these include agreements in which one country unilaterally offers preferential tariffs to another country or group of countries. The country offering the preference raises or lowers import duties on imports from those countries without receiving the same preferences in return. These agreements generally focus only on trade in goods. However, not everyone benefits from the expansion of trade.
Although increased trade is unlikely to have a significant impact on overall employment, trade can affect different workers in different ways. Workers in occupations, firms and industries that develop as a result of trade may earn more money, while workers in shrinking professions, firms and industries earn less money or experience above-average unemployment. These losses can be temporary or permanent. Nevertheless, economic theory and historical evidence suggest that the diffuse and long-term benefits of international trade have outweighed the concentrated short-term costs. This conclusion has always received strong support from the economy. Second, the term “preferential trade agreements” can be used to refer to partial scopes. These agreements provide preferential market access by reducing import duties on a limited quantity of goods. Free trade associations: In free trade associations, internal trade must be duty-free. Examples include the North American Free Trade Agreement and the ASEAN Free Trade Area. A Regional Trade Agreement (RTA) is an example of an EPA. In the United States, some industries, such as automakers and electronics, prefer RTAs because such agreements allow these industries to take advantage of low manufacturing costs in other countries in the hemisphere while avoiding the competition from European and Japanese manufacturers that they would face under a multilateral agreement.
 An important example of this is the Generalised System of Preferences (GSP): a unilateral preferential programme proposed by many industrialised countries (e.g. . . . .