- Free Trade Area (FTA)
• The North American Free Trade Area (NAFTA) and
• The Association of Southeast Asian Nations (ASEAN)
- Customs Union
An example of a customs union is the one which exists between Switzerland and Liechtenstein.
- Common Market
The European Union is an example of a common market till the late 1990s.
- Economic Union
The European Union is currently moving toward economic union status as only 12 out of 25 countries have adopted the Euro.
- Political Union
The United States, transformed from 13 separate colonies into one, is an example of a political union.