Free Trade Area Definition and Characteristics

The situation described is a Free Trade Area (FTA). This type of trade bloc is characterized by two main features:

• Elimination of tariffs and quotas on trade between member countries.
• Retention of independent trade policies and tariffs by each member country when trading with non-member countries (third countries).

The question highlights that intra-region trade is duty-free, meaning members trade freely amongst themselves. It also specifies a variation in tariff structures for imports from third countries. This independence in setting external tariffs is the defining characteristic that distinguishes an FTA from other forms of economic integration.

Distinguishing FTA from Other Trade Blocs

Let's analyze why the other options are not the correct fit:

• Customs Union: Requires members to have duty-free internal trade and a common external tariff policy towards third countries. The question states tariffs vary, ruling this out.
• Common Market: Includes the features of a Customs Union plus the free movement of factors of production (like labor and capital) among members. This is a broader integration level than described.
• Economic Union: Encompasses a Common Market but adds coordination of economic policies (like fiscal and monetary policy). This is the most advanced form of integration and does not match the scenario.

Therefore, the scenario where intra-region trade is duty-free but external tariffs differ is precisely the definition of a Free Trade Area.