1.
- where a product is produced in one country but sol in another
2.
- a tax imposed by the government
3.
- when an individual, firm or country produce narrow range of goods/services and over time develops a comparative cost advantage
4.
- when workers specialize in a productive activity
5.
- when individuals or businesses buy products or services produced in another country
6.
- exchange of goods and services across borders.
7.
- money given to a business from the government
