A regional trading bloc (RTB) is a co-operative union or group of countries within a specific geographical boundary. RTB protects its member nations within that region from imports from the non-members. Trading blocs are a special type of economic integration. There are four types of trading blocs −

●      Preferential Trade Area − Preferential Trade Areas (PTAs), the first step towards making a full-fledged RTB, exist when countries of a particular geographical region agree to decrease or eliminate tariffs on selected goods and services imported from other members of the area.

●      Free Trade Area − Free Trade Areas (FTAs) are like PTAs but in FTAs, the participating countries agree to remove or reduce barriers to trade on all goods coming from the participating members.

●      Customs Union − A customs union has no tariff barriers between members, plus they agree to a common (unified) external tariff against non-members. Effectively, the members are allowed to negotiate as a single bloc with third parties, including other trading blocs, or with the WTO.

●      Common Market − A ‘common market’ is an exclusive economic integration. The member countries trade freely all types of economic resources – not just tangible goods. All barriers to trade in goods, services, capital, and labor are removed in common markets. In addition to tariffs, non-tariff barriers are also diminished or removed in common markets.